The first two explosive devices, believed to have been fired with an M79 grenade launcher, hit the main parking area of Thai PBS television station in Vibhavadi Soi 60 in the Laksi area shortly after 7pm. The blast damaged three cars belonging to station employees.
Another two grenades were fired into the Royal Thai Police Sports Club compound which is located next to the Thai PBS station and houses the Centre for the Administration of Peace and Order (Capo). One caused damage to the club’s roof while the other dropped on a lawn near a tent of riot police officers from Bung Kan province, but did not explode.
Police initially assumed that the attacker may have fired the M79s from a nearby tollway and actually targeted the police club, which houses the Capo office, but misfired and the grenades hit the adjacent television station.