The warning by one of the 161 passengers on the flight headed for the Red Sea resort of Hurghada that there was a bomb on board was "completely false," Prime Minister Boyko Borisov said.
"It was because of a drunken Polish passenger talking rubbish. At the very least it was a useful exercise" for Burgas airport where the plane landed early today, he told public broadcaster BNR.
All passengers had to be evacuated from the Small Planet aircraft after it touched down at 5:45 AM (0915 IST) and police conducted a search, finding nothing suspect.
Security services are currently on extra high alert after tomorrow's terror attacks in Paris and the downing of a Russian airliner over Egypt on October 31 with 224 people on board, which Moscow said this week was caused by a bomb.