A second explosion has been reported in the Thai capital of Bangkok Tuesday, just a day after a bomb attack at a popular tourist site killed more than 20 people and left scores more injured.
No one was hurt in Tuesday's bombing, police said.
The bomb in question appears to have been a hand grenade hurled from the Thai capital's busy Sathorn pier, before exploding harmlessly in the water.
It is not yet known whether the two attacks are related.
This latest incident comes as Thailand struggles to come to terms with the worst terrorist attack on its soil in recent memory.
Monday's attack saw a large bomb detonated next to the Erawan Hindu shrine in central Bangkok, a major attraction which also draws a large number of Buddhist worshipers and other foreign tourists from around the world.
Thai authorities say they have identified a suspect, who was caught on CCTV cameras leaving the site of the attack.
While it is certain the bombing was an act of terrorist, security agencies are still unsure who precisely was behind it.
Muslim insurgents in southern Thailand are among the prime suspects, as are political opponents of the country's current prime minister, Prayuth Chan-ocha.