A jealous buddhist monk has been arrested for allegedly hacking his eight-month pregnant ex-girlfriend to death with a machete after spotting her with another man.

Monk Um Deeruenram, 57, was driving his van through Thailand when he passed the home of his ex-girlfriend Lampai Bualoi, 33.

The monk was overcome with ‘uncontrollable rage’ as spotted her sitting in a truck with her new boyfriend.

He then allegedly rammed his van into the couple’s vehicle outside the house in Buriram.

After exiting the truck, Lampai’s new boyfriend is believed to have fled the scene when the monk allegedly tried to fight him.

It is claimed the monk then grabbed a machete from his van before he hacked his former lover, who was carrying his unborn baby, to death.

The monk then allegedly approached Lampai’s home where he confessed to the horrific crime and said he felt ‘uncontrollable rage’ at seeing her with another man.

Officers at the scene arrested the monk, who was dressed in his traditional robes, and took him into custody.

Investigators discovered Lampai’s slaughtered remains with several gashes across her head and body.