Beijing:
Four persons have been killed and 11 others injured in an explosion at a residential building in northeast China's Liaoning province.
Part of the building collapsed after the blast at around 5 am in Huludao city, according to a statement from the city publicity office.
The 11 injured, including residents and passersby, have been sent to hospital.
"I thought it was earthquake," said a resident.
"I rushed out of the building immediately, and found smoke pouring from the building," state-run Xinhua news agency quoted a survivor as saying.
Yesterday's explosion is thought to have been caused by a gas leak.
A similar explosion in Huludao City on May 31 left two persons dead and 11 others injured.
Meanwhile, firefighters have put out a fire which broke out in a chemical plant in east China's Jiangsu Province following an explosion last night.
Three plant workers and a firefighter were slightly injured as they were putting out the fire in the Dynamic chemical plant in an industrial park in Nanjing.