Meanwhile Turkish news agencies were spreading the claim that it was a domestic dispute.
Via BBC:
Dutch prosecutors investigating the murder of three people on a tram say a letter was found in the gunman’s getaway car and it is one of the reasons why a terrorist motive is being seriously considered.
Three people were killed and three others seriously wounded in the attack in the central city of Utrecht.
Turkish-born suspect Gokmen Tanis was detained on Monday evening.
No connection has been found between him and the victims.
Prosecutors say a firearm was found when Tanis was detained.
“So far a terrorist motive is being seriously taken into account. Among other things a letter found in the getaway car and the nature of the facts give rise to that,” a statement said (in Dutch), without detailing the contents of the letter.