Kampong Chhnang town police have launched an investigation after remnants of a human leg that likely belonged to a man who disappeared four years ago were found in a pond on Sunday, local officials said.

Workers were clearing grass in Kampong Chhnang town’s Pa’er commune when they made the grisly discovery, commune police chief Som Chantha said.

According to Chantha, the left femur, or thighbone, was still in a pair of belted blue trousers.

Yesterday morning, Kiv Kimyang, 53, and her husband came to look at the remains, Chantha said.

They recognised the belt as one that had belonged to their son Sen Socheat, 23, who vanished in 2009, he added.

“After listening to the couple’s story, I reported the case to [town police],” he said.

Speaking with the Post yesterday, Kimyang was resolute the remains were her son’s.

“I think that this bone is my son’s, because I recognise the trousers and the belt that my son was wearing on the night he disappeared,” she said.

Socheat was a construction worker who disappeared after getting into a drunken argument at a party in January 2009.

Kimyang added that after her son disappeared, she dreamt that he came to her and asked for a blanket because he was cold after being killed by his friends, who had left his body in a pond.

“But I did not believe the dream [at the time]” she said.

Yesterday morning, police questioned four people suspected of being involved.

Hul Vesna, Kampong Chhnang town deputy police chief, told the Post that the man could have been drunk-driving when he fell into the pond and drowned.

“We questioned four people, two of whom are … friends of the victim.… They are also suspected by the victim’s mother of being involved in an argument with the victim on the night he disappeared. All of their answers [check out], but authorities will continue to investigate to find the truth,” he said.