KAWASAKI -- More human body parts have been discovered in an apartment here where a foot was found earlier this week, it has been learned.

According to the Kanagawa Prefectural Police force, part of a right foot that was cut a few centimeters above the ankle, a left leg cut from the knee and a head were found between March 5 and 6, in an apartment in Kawasaki's Miyamae Ward.

A 43-year-old woman and her son, 19, who live together in the apartment remain missing. Police found their mobile phones in the room when they discovered the body parts. Officers are investigating the incident and are searching for the missing two.

Investigators said they found the right foot wrapped in a towel and newspaper inside a plastic bag on the kitchen floor on March 5.

Later that day, they discovered the left leg part in another plastic bag. Judging from the size of the right foot, it apparently belongs to a female. A bloodstained knife was found near the plastic bags and traces of blood were on the floor, but the room does not appear to have been ransacked.

Prefectural police also said on March 6 that they have found the head, believed to be that of a woman, in the same apartment, but have not disclosed details of how they found it.

According to related sources, the son had been attending work until March 1, but he called in sick the following day. He has been absent since without any contact. The woman has also been absent from work since March 3.

The 46-year-old husband of the woman's sister, 40, who live in Yokohama's Tsuzuki Ward reported to police at around 6:30 p.m. on March 4 that they hadn't been able to get in touch with the woman for a few days. Accompanied by the family members, police officers went to check the woman's apartment later that day. The front door was locked and nobody was inside, but when the sister and officer checked the room again on March 5, they found the right foot inside a plastic bag.

The apartment is located in a residential area about 500 meters southeast of Saginuma Station on the Tokyu Denentoshi Line.