Seven people were killed and another three injured after a residential building caught fire late Monday in east China's Zhejiang Province, local authorities said on Tuesday.

The fire broke out at 11:25 p.m. Monday on the third floor of a 7-storey residential building in Longgang Township, Cangnan County of Wenzhou City, a spokesman with the city fire department said.

Fire fighters rescued four people trapped in it and extinguished the fire around 1:15 a.m. Tuesday. Six people died at the scene and one died later in hospital, according to the spokesman.

Investigations into the cause of the fire are underway.