Over 260 fishermen stranded off Bhatkal coast rescued by the Indian Coast Guard

Bengaluru, May 20: A mysterious "boom" heard in large parts of Bengaluru this afternoon left residents of the city and social media users puzzled. While the source of the sound is being investigated, the Indian Air Force (IAF) indicated that it could be the result of "routine test flights that necessitate going supersonic a times".

The sound was heard from as far as the Bengaluru airport in Devanahalli to the IT hub of Electronic City 54 km away. It was also heard in Kalyan Nagar in east Bengaluru, central Bengaluru's MG Road and areas such as Marathahalli, Whitefield, Sarjapur and Hebbagodi.

IAF said no aircraft of training command was flying in the area. "However, ASTE (Aircraft and Systems Testing Establishment) and HAL (Hindustan Aeronautics Limited) could have been undertaking their routine test flying, which necessitates going supersonic at times. These are done well beyond the city limits in specified sectors. However, considering the atmospheric conditions and reduced noise levels in the city during these times, the aircraft sound may become clearly audible even if it happened way out from the city," said the air force statement.

Many people had speculated that the sound could have been caused by a fighter jet such as a Mirage 2000.

"We have also asked the Air Force Control Room to check if it was a jet or supersonic sound. Bengaluru police are awaiting confirmation from the Air Force," Bengaluru police commissioner Bhaskar Rao said in a statement.

It was not an earthquake, Karnataka's state disaster monitoring centre had tweeted earlier.

"Earthquake activity will not be restricted to one area and will be widespread. We have checked our sensors and there is no earthquake activity recorded today," the Karnataka State Natural Disaster Monitoring Centre said, quoting its director Srinivas Reddy.

"The activity reported in Bengaluru is not due to an earthquake. The seismometers did not capture any ground vibration as generally happens during a mild Tremor. The activity is purely a loud unknown noise," the agency tweeted.

#Bangalore and #BangaloreBoom was among the top trends on Twitter this afternoon.

"We are trying to ascertain the source of the noise," a senior police officer said. "In Whitefield area, we have searched on the ground and so far, there is no damage to any property," he added. There were no calls to the police control room reporting any damage.

Udupi, May 17: A total of 1,460 migrant labourers left for Uttar Pradesh from Indrali Railway Station in Udupi in Shramik Special train on Sunday.

This is the first train to ferry migrant labourers from Udupi. As many as 236 from Karkala, 323 from Kundapura, 901 labourers from Brahmavar, Kaup and Udupi left for their native villages.

More than 2,000 labourers had gathered at the railway station and only 1,460 labourers received tickets to travel.

Those who did not receive tickets were disappointed and got into heated arguments with the officials.

The labourers were promised that they will receive tickets to another train, that would depart from Udupi before May 20. One bogie of the train was reserved for pregnant women, women and children.

As many as 1,712 from Jharkhand, 770 from Odisha, 977 from West Bengal, 1,600 from Bihar, 379 from Madhya Pradesh, 280 from Chattisgarh, 110 from Uttarkhand, 379 from Rajasthan had registered on Seva Sindhu portal.

Additional Deputy Commissioner B Sadashiva Prabhu said that there are plans to make arrangements to send migrant labourers from UP, Uttaranchal, Madhya Pradesh and Jharkhand.