An attacker, 30-year-old man, fled the crime scene but was detained by police quickly afterwards. The motive behind the assault has not yet been established.

According to the police, nine people, including "members of Boise's refugee community" were stabbed by an attacker at an apartment complex in Boise, Idaho, on Saturday.

All victims have been sent to hospital, with four of them getting life-threatening injuries, police said.