Firefighters are investigating a small fire that caused about $20,000 damage to a Chinese restaurant tonight on Lagoon Drive.

The fire broke out about 8:40 p.m. at Lagoon Chinese Food, 496 Lagoon Drive, when the restaurant was already closed, said Honolulu fire Capt. Terry Seelig. Witnesses at the next door strip club, Lagoon 500, reported the fire.

Firefighters saw smoke coming from the building and forced their way in to find a small fire in the corner of the kitchen, Seelig said.

The fire was extinguished by 8:57 p.m., and no one was injured.

 Seelig said the fire damaged mostly contents and the restaurant could reopen Friday.

A cause has not been determined.