A 43-year-old man was taken to the hospital in serious condition Monday after he was burned while cleaning the kitchen of a ramen restaurant in the Mililani Town Center.

The fire, which was reported at 10:15 p.m., was started by a gas leak at a fitting to a kitchen table, which had corroded, said Fire Captain Terry Seelig, department spokesman.

The flash fire was ignited by a pilot light, which also activated the restaurant’s sprinkler system. The fire was brought under control by 10:30 p.m.

The fire and the water from the sprinkler system caused $25,000 worth of damage in the kitchen of New Genki Ramen at 95-1249 Meheula Parkway.

The worker, who was cleaning the kitchen after the restaurant had closed, was treated at the scene for burns to the front of his body before being taken to a burn center.