India, Aug. 8 -- A drone entered Bulgarian airspace on Saturday, Aug 8 and exploded close to an international gas pipeline shortly after crossing the border from Romania.

Bulgaria's Prime Minister Rumen Radev said the drone exploded just after 5 a.m. about 100 metres inside Bulgarian territory. It was not detected or identified while flying through either Romanian or Bulgarian airspace.

"There are no casualties or damage to buildings. The area has been cordoned off. We continue to monitor the situation," Radev said following a government emergency meeting.

Radev said the unmanned aerial vehicle exploded around 200 metres from a Romanian compressor station, and about a kilometre from Bulgaria's compressor station on the Trans-Balkan gas...