KAILI, Guizhou, Jan. 15 -- Police has ordered the arrest of a suspect in their investigation of Monday's fatal explosion at a gambling den in southwest China's Guizhou Province, said local authorities on Wednesday.

A 35-year-old man surnamed Wu has been put on a nationwide wanted list, according to police authorities in Guizhou.

Fifteen people were killed in the blast, which occurred at 2:40 p.m. on Monday at a gambling site on a remote mountain slope in Laoshan Village of Kaili City. Another eight people were injured.

The casualties were people who had gathered at the site to gamble.