Interesting, in the yahoo article on the same topic, the article claimed that he intended to shoot pigeons:
SINGAPORE — When water guns failed to keep pigeons away from his flat, a man turned to shooting metal ball bearings at them with a catapult.
Unfortunately, his ammunition landed on a convoy of vehicles belonging to groomsmen and bridesmaids who had been engaged in “gate-crashing” games in the vicinity.
On the morning of 1 July 2017, a few bridesmaids heard loud bangs and two men involved in the event found holes on the rear windscreens of their vehicles. One of them called the police.