Authorities said that no motive had been established for the stabbing attack in Amsterdam that injured five people.

The man suspected of stabbing five people in the centre of Amsterdam is a 30-year-old Ukrainian national from the eastern Donetsk region largely controlled by Russia, Dutch police say. Officers said they were still unclear about the motive for the attack, near the busy Dam Square on Thursday afternoon.

A knife-wielding assailant in Amsterdam seriously wounded five people — including two from the United States, one from Belgium and one from Poland — in a stabbing attack Thursday on a busy shopping street,