A Chinese man pleaded guilty Tuesday to slaying the father of a family of four murdered here last June and helping to dump their bodies in Hakata Bay.

Wei Wei, 24, a former student at a Japanese-language school in Japan, owned up to the charge at the start of his murder trial before the Fukuoka District Court. Wei told the court he did not know how three of the family members died because he did not actually witness their murders.

According to the indictment, Wei and two other Chinese men killed Shinjiro Matsumoto, 41, a clothing dealer, his wife, Chika, 40, and their son, Kai, 11, and daughter, Hina, 8, on June 20 and stole about 37,000 yen in cash. Their bodies were found the same day in Hakata Bay, handcuffed and weighted down with dumbbells.