Police are still investigating

Armed with a shotgun, a man in his thirties went on a shooting rampage at a church, killing 2 and injuring a few kids. Motives are unknown and the police are investigating. The gunman was found dead in a pool of blood, believed to have shot himself after committing the crime.

As quoted from asiaone,

He then randomly opened fire at people in the lobby and in an adjoining office, before moving to the pool area where a swimming class for children was going on

Source: http://news.asiaone.com/News/The%2BStraits%2BTimes/Story/A1Story20071216-41285.html