Explosions at a fireworks plant in China's northwestern province of Gansu killed one person and injured six, state media said on Tuesday, the second such event in a day in a country still on edge after blasts killed at least 145 people last month.

Two explosions hit the factory, where production was suspended after safety hazards were found during a May inspection, in the city of Longnan soon after 3p.m., the official Xinhua news agency said.