A bomb has exploded in the centre of the Thai capital, Bangkok, seriously wounding a security guard.
The explosion, at a duty-free store, was close to the site of a recent grenade attack.
The BBC reports it was the third such incident within the past month and the second on the same building.
Bangkok is still under emergency rule since anti-government protests in April and May, were broken up by troops.
The target of the attack was the King Power duty-free store which holds the lucrative monopoly on duty-free sales in Thailand.
The owner of King Power is closely associated with the leader of one of the key parties holding the current coalition government together.