Six people were injured when suspected Islamic terrorists hurled bombs at a railway checkpoint in Thailand.

CCTV footage shows the suspects lobbing two explosives at motorists driving through a railway crossing in southern Yala province, on March 5 evening.

Only one of the pipe bombs detonated, injuring six people and damaging a nearby trailer truck with shrapnel. The injured motorists were taken to the Yala Hospital for treatment.

An explosive ordnance team later arrived at the scene to collect the unexploded bomb.

The local rescue unit said: 'The perpetrators threw a bomb at a checkpoint on the railway road near the Yala market, causing several villagers to be injured. We have rushed them to Yala Hospital.'

Two separate bombings rocked the same region two weeks ago, ahead of former Thai Prime Minister Thaksin Shinawatra's visit to the southern Thailand.

One person was killed and 27 others were injured in the twin blasts that targetted a convenience store in Yala province, and the Narathiwat Airport where the former Man City owner had been scheduled to land on February 23.

Islamic separatist terror attacks target the three southernmost provinces of Thailand - Yala, Pattani and Narathiwat - next to the border with Mulsim neighbors Malaysia. Thai state employees and infrastructure are often hit while attacks on civilians are rare.

Officials believe the conflict dates to a deal in 1909 that the British Empire struck to incorporate the Muslim region into the Siamese mainland.

The region's culture is more similar to Malaysia and dramatically different to Buddhist Thais causing decades of tension that lead to the emergence of separatist groups fighting for independence in the 1960s.

The struggle has continued ever since with more than 7,344 people killed and 13,641 injured between January 2004 and March 2022.

The British Foreign & Commonwealth Office warns against all but essential travel to the region while Canada's government warns its nationals to 'avoid all travel' to the three provinces.