Atsunobu Usuda, 49, was arrested after the incident which took place before 6am local time on Saturday. Local reports suggested he may have had political aspirations.

A man threw several firebombs into the headquarters of Japan's ruling party in Tokyo Saturday, then crashed his car into the fencing of the prime minister's residence, Tokyo police said. There were no reports of injuries.

An assailant tried to breach security at the office of the new prime minister, Shigeru Ishiba, a public broadcaster reported.

A man has thrown several firebombs into the headquarters of Japan’s ruling party in Tokyo, according to public broadcaster NHK and other Japanese media.

A man was arrested after throwing several suspected petrol bombs at the headquarters of Japan's ruling party Saturday and ramming his car into a fence outside the prime minister's office,

A man threw several firebombs into the headquarters of Japan’s ruling party in Tokyo Saturday, media outlets report.

A man threw several firebombs into the headquarters of Japan's ruling party in Tokyo Saturday, public broadcaster NHK and other Japanese media reported. There were no reports of injuries. The man, who was arrested on the spot,