Tokyo (CNN) — The son of a local Japanese government official is in police custody after allegedly going on a shooting and stabbing rampage in the central city of Nakano on Thursday, a rare crime in a country with tough gun laws and a low murder rate.

Masanori Aoki, a 31-year-old farmer, was arrested on suspicion of killing a 61-year-old police officer by shooting him in the chest with what appeared to be a hunting rifle, police in Nakano, a city in the country’s Nagano prefecture, told CNN.