The explosion that killed a waiter in Pandan Indah, Ampang, on Dec 29 is believed to have been sparked by personal problems between the victim and the couple who were arrested over the case.

Acting Selangor police chief S Sasikala Devi said the victim and two suspects, aged 33 and 30, were acquaintances from their village in Kedah, with the husband being a contractor and the spouse a housewife.

However, Sasikala refused to...