A Thai soldier was injured while clearing unexploded ordnance along the Thai-Cambodia border.

Police Sergeant Major Chakrakrit Chaisrisa and other bomb specialists were carrying out a controlled explosion when shrapnel cut into his shoulder.

Footage shows troops taking cover some 120 metres (400 feet) away before detonating a Cambodian mortar collected from farmland in Sisaket province, on January 14.

The blast sent a shockwave through the remote area before Chakrakrit felt a sharp pain on his left shoulder. His colleagues found a metal fragment embedded in his flesh.

Chakrakrit was given first aid and later received three stitches from a hospital.

He said: 'I'm safe now. I'd like to warn the public: if you find any explosive devices or craters from a Cambodian artillery shell, please report it to 191, the village security team, or the authorities for inspection and disposal. This is the safest option.

'During every operation, all officers wear bulletproof vests and helmets for safety. These must be worn at all times, and the helmet is made of steel to protect against impact and reduce force. We demonstrate how to wear them properly for the safety of our officers and we warn nearby residents beforehand.'

Explosive ordnance units have been recovering unexploded Cambodian shells left from weeks of fighting along the border.

Thailand and Cambodia declared a ceasefire on December 27, ending weeks of conflict that left at least 26 Thai soldiers dead and one Thai civilian injured.

In Cambodia, the number of military fatalities is believed to be much higher, though regime chiefs have not revealed the actual figure.

But the truce has been put in jeopardy following alleged Cambodian mortar fire that injured a Thai soldier in Ubon Ratchathani province on January 6.

Cambodia has allegedly dismissed the cross-border fire as an 'accident', claiming two of its soldiers were also injured in a 'rubbish heap explosion' in Cambodia's Preah Vihear province, opposite Ubon Ratchathani.

Thai Prime Minister Anutin Charnvirakul has demanded an explanation for the alleged peace breach, adding Thailand is prepared to retaliate if necessary.