Zhou Yuxin, 33, said he also wanted to kill his father-in-law after he called Zhou “useless” and refused to lend him money for his electrical repair shop in Anshan city, the state --inhua news agency said, quoting local police.

Zhou, who was caught by police in Liaoning province on Friday, also suspected that his wife was having an affair with a car-wash worker, it added.

The victims' bodies were found on Thursday at a bathhouse and a neighboring car wash, the report said, after the killings took place late Wednesday and early Thursday.

Among the dead were Zhou's wife, son, father, a female bathhouse worker, three relatives of Zhou's landlord and three car-wash workers, --inhua said.

Zhou did not tell police why he killed his father and son, it said.