An explosion ripped through a building in south China's Guangzhou City killing at least four people and wounding 36 others, local police said.

The blast occurred at 11:50am in a roadside warehouse in the Ezhangtan area of Baiyun district on Tuesday.

Rescuers found the remains of four bodies at the scene. However, the Nanfang Daily, a national newspaper, reported that the death toll had risen to seven.

Investigation has showed that the explosives were toy pistols, the production and circulation of which is forbidden in China, Xinhua reports.

The warehouse, which covers an area of 14,000 square metres, is mainly used to stores shoes.

Source: Agencies