NINGBO?-- Four people were killed and another two injured after a fire broke out at a fast food restaurant in East China's Zhejiang province early Saturday morning, local authorities said.

The victims are family members. The dead include three males and a female. The fire broke out at about 1 am at the restaurant in Cixi City and was put out 30 minutes later, according to the municipal government.

The fire did not affect houses nearby.

The cause of the fire is being investigated.