WARSAW, Poland (AP) _ A Romanian airlines plane made an emergency landing in Warsaw today after the captain told Polish air controllers a bomb might be on board.

The British-made BAC-111 jet operated by Tarom airlines was on a flight from Bucharest to Copenhagen when the pilot requested permission to land, said Marek Wos, spokesman for Warsaw's Okecie airport.

All 21 passengers and crew were immediately evacuated and military experts were searching the plane, Wos said. He declined to say what prompted the pilot to report a bomb threat.

On Friday, a Tarom airlines plane crashed shortly after takeoff from Bucharest's Otopeni airport, killing 60 people. Investigators suspect an in-flight explosion caused that crash.

A Tarom airlines plane enroute to Paris made an emergency landing Monday in the Romanian city of Timisoara after reporting a bomb threat, but no explosives were found.