An explosion happened early Thursday morning in a residential building in Jixi city, Northeast China's Heilongjiang province. [Photo/CFP]

HARBIN - At least one person was killed and another 15 were injured after an explosion happened early Thursday morning in a residential building in Northeast China's Heilongjiang province, local authorities said.

Police in the province's Jixi city received report at about 5:26 am that an explosion occurred at a building in Longshan International Community, according to the municipal government.

The fire was extinguished. Rescue is under way at the scene.

The cause of the accident is being investigated.