BANGKOK, Aug 27 — A security guard was seriously injured by a grenade explosion on Rangnam Road near the King Power duty-free shopping complex in central Bangkok, in the latest attack at the shopping centre.

Jetsada Jankrajang, 24-year-old security guard, was sent to Rajavithi Hospital with shrapnel wounds on his head and body.

The explosion occurred at 11pm Thursday night, only a few metres from the site of an earlier grenade blast less than a month ago on July 30.

The police Explosive Ordnance Disposal team (EOD) inspected the area for nearly an hour, inside and outside the shopping complex.

Six glass windows were shattered, and fragments of an M67 grenade were found at the scene, along with minimal damage to the pavement near the gate.

MCOT