A Taiwanese man suspected of stabbing to death two female compatriots slashed his throat in the back of a Japanese police car as he was being taken for questioning, a police spokeswoman said Tuesday.
Chang Chih-yang, 30, was picked up over the killings of Lin Chih-ying, 22, and Chu Li-chieh, 24 -- both language school students in Tokyo -- whose bodies were found with multiple stab wounds last week, Tokyo police said.
Officers found Chang in Nagoya on Monday and took him to a nearby police station, the spokeswoman said, adding that an initial search of the suspect had been carried out.
But as he arrived at the police station he produced a knife and slashed his throat, she said. He was taken to hospital where he was confirmed dead.
"It is really regrettable that the suspect killed himself," said Tokyo police in a statement.
Local media reported that Chang, who was also a language student, had been spurned by Lin.
Independent investigations into deaths in police custody are not routine in Japan and any probe is often carried out by officers from the same department.
A spokesman from the Tokyo police press section said he was not aware of any plans to carry out an independent investigation into the suspect's death.© AFP