New Delhi: In yet another incident of violation of Indian airspace, an unidentified aircraft was sighted 180 nautical miles off Chennai even as Civil Aviation Minister Shahnawaz Hussain accused Pakistan ATC (Air Traffic Control) of misleading an American plane that was forced to land in Mumbai on February 3.

"Even today an unidentified plane was sighted 180 nautical miles off Chennai ... and it did not respond to our signals", the Minister said.

The ATC immediately informed the Air Force and the matter was also brought to the notice of the Defence and External Affairs ministries, he said.

On the intrusion of the American aircraft belonging to Conco Corporation, he said after thorough questioning of the crew it was found that they were misled by the Karachi ATC, which gave them a wrong route to fly to Male from the Pakistani port city. "We had to ground it."

He said that India would complain to the International Civil Aviation Organisation (ICAO) about the Pakistani ATC giving the aircraft wrong route. "ICAO should probe the matter," the Minister said.

Last week a US Air Force aircraft was sighted over 100 nautical miles off Chennai. The aircraft did not respond to ATC's signals.

PTI