Woman, 3-month-old daughter allegedly burnt alive by in-laws over dowry in UP's Rampur

Warangal, May 26: A 26-year-old man from Bihar was arrested here for murdering nine people by throwing them into a well to cover the murder of a woman, police said on Monday.

Dr Ravinder, Commissioner of Police (CP), Warangal, said that the bodies were recovered on May 21 and May 22 from the well. Investigation has revealed that the accused, Sanjay Kumar Yadav, killed all of them to cover up the murder of Rafiqa, with whom he had a relationship.

He said that Yadav got acquainted with a person named Maqsood and his sister-in-law Rafiqa. "Slowly, he came close to Rafiqa and started living together with her three children. Yadav tried to misbehave with Rafiqa's 15-year-old daughter. Rafiqa did not like this and threatened to lodge a complaint against him," Ravinder said.

"Then, Yadav planned to kill Rafiqa in order to live with her daughter. Yadav promised Rafiqa to marry. They boarded a train to West Bengal from March 7. Yadav mixed sleeping tablets in the food packet and later strangulated her, and threw her body outside the train," he said.

According to police, Yadav later came back to Warangal but Maqsood's wife Nisha started questioning him about the whereabouts of Rafiqa.

"Nisha threatened to lodge a police complaint against him. With a premeditated motive, from May 16 to May 20, he visited Maqsood's family who stayed in a gunny bag factory," he said.

Yadav purchased sleeping pills from Warangal and mixed in the food on the birthday of Maqsood's elder son on May 20, police said.

"Maqsood and his five family members were living there. Yadav mixed sleeping pills in the food and later they consumed it. Maqsood's family friend Shakeel was also there. Then, he went to the first floor of the factory where two labourers were staying. He mixed sleeping pills in their food too. He suspected that they may get up and create a problem. To cover up the murder of Rafiqa, he killed nine people," Ravinder said.

At around 12:30 am, Yadav woke up and saw that everyone is asleep, according to police.

"Then, he used the gunny bags to drag all the nine people into the well. He threw the gunny bag one by one into the well," Ravinder said.

According to the police, six teams were deployed to investigate the case.

"Yadav has been arrested now and will be taken to police custody. We will collect all evidence and ensure that he gets maximum punishment for this offence," Ravinder said.

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.