two American men suspected of trying to send infant and adult body parts in parcels to the US have fled Thailand, police say.

A baby's head, a baby's foot sliced into three parts, a heart and a "sheet of skin" with tattoo markings were found in parcels after staff at a shipping office in Bangkok scanned the packages.

The parts were stored in plastic containers filled with formaldehyde and the packages were destined for an address in Las Vegas.

Police Lieutenant General Ruangsak Jaritake said: "The packages were marked 'children's toys' but X-rays showed they were not children's toys. We found human body parts in five plastic containers."

Police said the two suspects, aged 31 and 33, fled Thailand on Sunday through a checkpoint in the east of the country. They are believed to have left for Cambodia.

Thai police plan to contact the FBI once the results of forensic tests are known.

Doctors at Siriraj Hospital, Bangkok, said the body parts had been taken from its Medical Museum, nicknamed the Museum of Death.