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New Delhi, Feb 5: Kapil Baisala who opened fired at the Shaheen Bagh protest site last week is a member of the Aam Aadmi Party, police said on Tuesday, sparking a war of words between the BJP and the AAP.

While the BJP accused Chief Minister Arvind Kejriwal of "playing" with the security of the country, the AAP hit back, stating the saffron party was indulging "dirty politics".

Deputy Commissioner of Police (Crime Branch) Rajesh Deo said that Baisala and his father joined the AAP in early 2019.

Baisala's family, however, refuted the police's claim.

Kapil Baisala's uncle Fatesh Singh told PTI, "I have no idea where these photographs are circulating from. My nephew Kapil had no association with any political party nor does any other member from the family. My brother, Gaje Singh, (Baisala's father) fought assembly elections in 2008 on a Bahujan Samaj Party ticket and lost. After that no one from our family had any links with any political party."

Singh added that Baisala also doesn't have friends associated with the AAP or any other political party.

Gaje had also contested the 2012 civic body polls from the BSP, the police said.

The police officer said they seized Baisala's mobile phone and retrieved WhatsApp data.

On Saturday, Baisala fired two rounds in air at Shaheen Bagh. According to eyewitnesses, the man shouted "Hindu Rashtra Zindabad" and fired two rounds.

He was overpowered by the police and later arrested.

In the pictures, it was seen that he and his father joined the party in the presence of Atishi Marlena, Sanjay Singh and other leaders, sources said.

The police said on Thursday, Baisala, along with his friend Sarthak Larolla, went to Shaheen Bagh from his village on a bike.

Through CCTV footage, it was found they took the DND flyover, Maharani Bagh, Sarai Jullena and reached Holy Family hospital, a senior police officer said.

"Baisala was not comfortable on the bike as he had hidden the pistol near his waist. They entered the hospital's parking where he adjusted the pistol, used the washroom and headed towards Shaheen Bagh," the senior official added.

When they reached the protest site, Larolla left the spot with the motorcycle and Baisala's mobile phone. Later, Baisala fired two rounds in the air and was apprehended. The weapon was recovered from near the spot, the police said.

Larolla joined the investigation and the mobile phone was seized from his residence.

Baisala has been remanded to police remand for two days.

He had bought the pistol around seven years ago for his brother's marriage. The source of the weapon from where he procured it is yet to identified, police said.

The sources said Baisala was previously also involved in firing incident but was never caught nor was a case registered against him.

Hitting out at the AAP, BJP president J P Nadda accused Kejriwal of playing with the security of the country and said that the people will give the party a befitting reply.

"I want to make clear to Kejriwal that this country is bigger than any election, any government, and the country will not forgive those who play with its security. The people of Delhi will give a befitting reply," Nadda tweeted.

Senior AAP leader Sanjay Singh asked on whose directions was the Delhi Police accusing his party.

"Before the police revealed it (Baisala being an AAP member), how did BJP's Delhi president Manoj Tiwari come to know about it," Singh asked and accused the police of maligning the party.

London, May 20: The current physical distancing guidelines of 6 feet may be insufficient to prevent COVID-19 transmission, according to a study which says a mild cough in low wind speeds can propel saliva droplets by as much as 18 feet.

Researchers, including those from the University of Nicosia in Cyprus, said a good baseline for studying the airborne transmission of viruses, like the one behind the COVID-19 pandemic, is a deeper understanding of how particles travel through the air when people cough.

In the study, published in the journal Physics of Fluids, they said even with a slight breeze of about four kilometres per hour (kph), saliva travels 18 feet in 5 seconds.

"The droplet cloud will affect both adults and children of different heights," said study co-author Dimitris Drikakis from the University of Nicosia.

According to the scientists, shorter adults and children could be at higher risk if they are located within the trajectory of the saliva droplets.

They said saliva is a complex fluid, which travels suspended in a bulk of surrounding air released by a cough, adding that many factors affect how saliva droplets travel in the air.

These factors, the study noted, include the size and number of droplets, how they interact with one another and the surrounding air as they disperse and evaporate, how heat and mass are transferred, and the humidity and temperature of the surrounding air.

In the study, the scientists created a computer simulation to examine the state of every saliva droplet moving through the air in front of a coughing person.

The model considered the effects of humidity, dispersion force, interactions of molecules of saliva and air, and how the droplets change from liquid to vapour and evaporate, along with a grid representing the space in front of a coughing person.

Each grid, the scientists said, holds information about variables like pressure, fluid velocity, temperature, droplet mass, and droplet position.

The study analysed the fates of nearly 1,008 simulated saliva droplets, and solved as many as 3.7 million equations.

"The purpose of the mathematical modelling and simulation is to take into account all the real coupling or interaction mechanisms that may take place between the main bulk fluid flow and the saliva droplets, and between the saliva droplets themselves," explained Talib Dbouk, another co-author of the study.

However, the researchers added that further studies are needed to determine the effect of ground surface temperature on the behaviour of saliva in air.

They also believe that indoor environments, especially ones with air conditioning, may significantly affect the particle movement through air.

This work is important since it concerns safety distance guidelines, and advances the understanding of the transmission of airborne diseases, Drikakis said.

New Delhi, Jan 7: A fringe right-wing group calling itself the Hindu Raksha Dal has purportedly taken responsibility for the attack on students of Jawaharlal Nehru University (JNU) in a video posted on social media.

The video, which was posted on social media on Monday and has gone viral since then, shows a man identifying himself as Pinki Chaudhary saying that those who resort  to “anti-national activities” will be treated in the same way that JNU students and faculty were.

He later told news channels that others involved in "anti-national activities" would face similar attacks.

There was no immediate reaction from the police on Chaudhury's claims.

“For several years, JNU has been a bastion of communists and we will not tolerate it. Hindu Raksha Dal, Bhupendra Tomar, Pinki Chaudhury take the responsibility of what has happened in JNU...all of them were our volunteers. Those who cannot do such work for Mother India don't have the right to live in this country,” Chaudhary is seen saying in the video.

“We are always ready to sacrifice our lives for Mother India. We will not tolerate anyone who speaks against the religion,” he added.

Efforts to reach the man were unsuccessful: his phone was switched off.

More than 35 students were injured Sunday when a masked mob went on the rampage, attacking students and professors and vandalising property. The JNUSU has accused the RSS-affiliated ABVP volunteers of attacking the students.