POLICE in the central Dutch city of Utrecht say they are investigating a shooting in a tram that left "multiple" people injured and are considering the possibility of a "terrorist motive".

Police, including heavily-armed officers, flooded the area after the shooting that happened on Monday morning on a tram at a busy traffic intersection.

Dutch Prime Minister Mark Rutte called the situation "very worrying" and the country's counter-terror co-ordinator said in a tweet that a crisis team was meeting to discuss the situation.

There have been no reports yet of any suspects arrested.