This is the dramatic moment the Thai army destroyed a Cambodian bridge as border fighting intensified.

Footage shows smoke erupting as multiple strikes hit the K5 bridge near the contested Ban Nong Chan village in Sa Kaeo, Thailand, on December 11.

The Thai army reportedly targeted the bridge to cut off a strategic logistics route on the Cambodian side.

The structure connects Poipet and Oddar Meanchey in Cambodia.

Fighting 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.

The Thai military said nine soldiers and three civilians have been killed, while more than 190 personnel were injured.
Cambodia said 11 civilians, including a baby, have died and 74 others were wounded.

More than 500,000 people have been displaced on both sides.

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.