One person was killed and three others injured in an explosion in a residential building in Harbin, capital of northeast China's Heilongjiang Province, on Thursday morning, local authorities said.

The blast, suspected to have been caused by an explosion of a gas tank, occurred at around 7 a.m. Thursday in the building in Harbin's Xiangfang District, according to the district's government.

The injuries of the three people are not life-threatening.

Further investigation into the cause of the explosion is underway.