THE HAGUE -- Four of the five people injured in a stabbing incident in central Amsterdam on Thursday afternoon are foreign nationals, Dutch police said.

The victims include a 67-year-old woman and a 69-year-old man, both American; a 26-year-old man from Poland; a 73-year-old woman from Belgium; and a 19-year-old woman from Amsterdam, according to a police statement.

The attack occurred near Sint Nicolaasstraat in the city center. Authorities arrested a male suspect shortly after the incident with the assistance of bystanders. The suspect, who sustained a leg injury, was taken to the hospital.

"The motive behind the attack is currently unclear and under investigation. Police are considering the possibility that the suspect may have randomly targeted victims, but the exact motive remains unknown," the statement read.

Authorities have urged anyone with footage of the incident to share it with investigators.