Footage is said to show rockets being launched by Cambodian troops from within a village being used as a human shield this morning.

The Thai military claimed the Type 90B 122 mm multiple rocket launch system was placed among civilians in Oddar Meanchey before missiles were fired into Sisaket province.

It is not known if the unguided rockets, purchased from China, struck targets in Thailand.

Fighting between the two countries flared up on Sunday as the Thai army claimed Cambodian troops fired on a Thai engineering team building an access road in a disputed border area.

Officials said at least 15 people, including Thai soldiers and Cambodian civilians, have been killed in the ensuing clashes, while more than 500,000 people have been displaced.

Cambodia's assault has largely been wayward, unguided rockets fired indiscriminately into Thai territory, while Thailand has used precision drone strikes and fighter jet strikes on military sites.

The BBC has reported that Thailand has provided 'compelling evidence' that Cambodia has also 'laid new landmines in bad faith' that have continued to injure Thai soldiers along the border.

Former Khmer Rouge henchman and Cambodian dictator Hun Sen - who was a leading figure in the genocide of his own people in the 1970s before assuming power in 1985 and overseeing the murder of thousands of opposition figures and critics - has repeatedly claimed that he wants peace and that Thailand is the aggressor.

Thai officials claim the ongoing border confrontations are a threat to national security, and the areas must be secured.