The blast happened at Bangkok's Don Muang airport, one of the two airports anti-government protesters of People's Alliance for Democracy (PAD) had taken control for days, website of The Nation newspaper reported early today.

Injured people have been sent to three hospitals including the Mongkut Wattana, Bhumiphol and Central General.

Ronnachai Chaisri, 29, from Songkhla province was reportedly dead on his way to the Bhumiphol hospital while Wijai Wijan, 43, was reportedly in critical condition, the report said.

Five people were severely injured, with one of them reportedly in critical condition. The PAD suspected that a bomb was fired from Don Mueng Toll Way.

The blast came after PAD ended yesterday the demonstration at the Government House which was seized by the civil group since August 26.

Maj. Gen. Chamlong Srimuang, one of the PAD's core members yesterday told protesters at the Government House to move to Don Muang and Suvarnabhumi airports which were also seized by them last week.

Chamlong said the anti-government demonstrators will no longer be allowed to spend a night at Government House for their own safety, following repeated grenade and gun attacks at the compound previously.

He said the daily demonstration at Government House will now beheld until evening, and only the PAD guards will station at the site during the night.

The PAD on August 26 seized the Government House and on November 25 and 26 occupied Bangkok's Suvarnabhumi International Airport and the Don Muang Airport, calling the Prime Minister Somchai Wongsawat to step down.