LANZHOU - A flight from Urumqi in China's Xinjiang made an emergency landing Wednesday night after the crew received warnings of a possible bomb aboard, police said early Thursday.

China Southern Airlines' flight 3912, en route from Urumqi to Guangzhou, landed safely at Zhongchuan Airport in Lanzhou, capital of the northwestern Gansu Province, at 9:53 p.m., officials with the Gansu provincial public security bureau said.

All the 93 passengers and 18 crew members were evacuated immediately, they said.

Police received reports from the air traffic control authorities at 9 p.m., saying the airline company had received warnings of a bomb aboard the aircraft, according to the provincial public security bureau.

Security workers questioned all the passengers and crew, and finished searching the aircraft by 4 a.m. Thursday, a spokesman with the public security bureau in Lanzhou said.

He said no bomb had been found.