Indonesia, Sept. 13 -- Indonesia's Police Forensics Laboratory Centre (Puslabfor) said malfunctioning cooking gas cylinders are suspected to have caused a mysterious explosion that damaged several houses in South Tangerang City early Friday.

"We found one 12-kg gas cylinder and three 5-kg gas cylinders," Commissioner Heriyandi, head of the metallurgy research sub-directorate at Puslabfor, stated here on Friday.

Investigators also recovered a gas regulator set and a stove from the site.

The items will be examined to determine their connection to the blast, he added, stressing that the forensic probe is still ongoing.

The Jakarta Metropolitan Police Mobile Corps, which deployed bomb disposal and chemical-handling units, reported finding...