Thailand's Prime Minister Prayuth Chan-ocha has said the bombing of a shrine in the capital, Bangkok, on Monday was the "worst ever attack" on the country.

The attack killed at least 20 people, including at least eight foreigners. Scores were injured.

Mr Prayuth said the perpetrators had not been identified, but that police were investigating one suspect seen on security footage at the shrine.

Wreckage of motorcycles are seen as security forces and emergency workers gather at the scene of a blast in central Bangkok August 17, 2015 (Source: Reuters)

The bomb targeted the Erawan Hindu shrine, a major tourist attraction.

It was detonated at about 19:00 local time (12:00 GMT) on Monday when the shrine, and the Ratchaprasong junction where it is located, were crowded.

(Source: BBC)