Wreckage of Indonesian Air Force plane Foker 27 is seen at the air force compound in Jakarta, Indonesia, on June 21, 2012. Indonesian Air Force plane Focker 27 crashed at the air force compound in Jakarta on Thursday, killing at least 9 people, Iskandar Sitompul, military spokesman said here. [Photo: Xinhua]

An Indonesian air force plane went down on Thursday during a routine training flight in Jakarta, military sources said Friday.

The Fokker 27 slammed into homes in air force base compound Halim Perdana kusuma in East Jakarta at 14:45 p.m. Jakarta time and ignited fire balls, Military Spokesman Iskandar Sitompul said.

The accident killed 11 people and wounded 12 others, said Azizah. S, spokesperson of the hospital in the compound where all the victims have been brought.

There were seven people onboard during the accident, including pilot, co-pilot, instructor and trainees, said Azman Yunus, Air Force spokesman.

The accident killed all the 7 people on board, and the rest were civilians, said Azizah.

Eight houses were destroyed by the plane, said Sitompul.

It has not been known yet the cause of the accident, but an investigation over the accident would be carried out, said Dede Rusamsi, deputy chief of staff of the Indonesian air force.

The result would be announced three months later, he said.

The pilot and co-pilot were on a good condition before the flight and so did the plane, said Rusamsi.

A ceremony for the funeral of the victims was conducted in the Halim Perdanakusuma air force base, led by Indonesian Coordinating Minister for Politics, Legal and Security Djoko Suyanto on Friday.