Bangkok shrine bomb: what we do and do not know on Monday

Update: Bangkok bombing aftermath - what we do and do not know on Tuesday

At least 20 people have died and dozens more have been injured in an motorcycle bomb explosion in central Bangkok.

The moment the bomb ripped through the intersection was captured by CCTV video, in which an orange flash can been seen in the background as pedestrians immediately start to run in the opposite direction from the blast.

What we know

The attack occurred during the evening rush hour at a busy intersection near the holy Erawan Shrine, a Hindu site popular with both Thais and foreign tourists.

A police spokesperson told Reuters that the incident involved a motorcycle bomb. One other bomb in the vicinity has been successfully diffused by authorities and there are reports that a third undetonated bomb has also been found nearby.

The Foreign Office has updated its travel advice to warn that the threat of a terror attack is "highly likely".

What we don't know

• The identity of the attacker(s) behind the bombing and their motivation
• The identities of the victims
• Whether all potentially explosive devices have been found
• Why the shrine was targeted

Car and motorcycle bombs are almost unknown in Bangkok, but have been used in southern Thailand, where a Muslim separatist insurgency has been flaring for several years.

Thailand's capital has been relatively peaceful since a military coup ousted a civilian government in May last year after several months of sometimes violent political protests against the previous government.

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