BANGKOK, Dec 1, 2008 (AFP) - Anti-government protesters have allowed 37 empty airliners to leave Bangkok's besieged main airport after agreeing to a request by Thai authorities, officials said Monday.

A total of 88 aircraft have been stranded at Suvarnabhumi international airport since demonstrators stormed the terminal and forced it to close last Tuesday.

"Thirty-seven aircraft have left Suvarnabhumi since the first aircraft of Siam GA (a regional airline) took off on Sunday evening," an Airports of Thailand spokeswoman said.

"International airlines will have to contact us to take those stranded aircraft out of Suvarnabhumi."

Of the planes stuck at Suvarnabhumi, 29 belong to flag carrier Thai Airways, 16 to Thai Airasia, 15 to private-run Bangkok Airways and 22 aircraft are from other airlines, the spokeswoman said.

Twelve belong to the airlines of foreign countries.

The People's Alliance for Democracy protest movement has refused to leave the airport, and the smaller Don Mueang domestic hub in Bangkok which it has occupied since Thursday, until the government resigns.

Police say they are in talks with the demonstrators but have also issued them with orders to leave under a state of emergency declared at the airports last week by Prime Minister Somchai Wongsawat.