A fire broke out in a factory in Southeast China's Fujian province at the early morning on Sunday, leaving four people dead and three injured, according to the local fire department.

A seven-storey building with a steel-concrete structure caught fire on its fifth floor. Nearly 300 square meters of the sanitary product plant were caught in the fire, local authorities said.

The local fire department received the alarm at 2:31 am Sunday morning and the fire had been extinguished at around 4 am.

The three injured have been set to the hospital for further treatment.

The exact cause of the fire is still under investigation.