Three people were seriously wounded Friday in a stabbing at a church-run centre which houses several aid organisations in the Dutch university city of Leiden.
Police said they were hunting for the male suspect who fled the scene.
A motive for the attack, which happened at the centre, a former bakery at about 9.30am (7.30am GMT), was not immediately provided.
The chairman of the centre, Bert Verweij, told regional broadcaster Omroep West that the wounded people were a staff member, a volunteer and a worker at one of the organisations that uses the center.
Police appealed for assistance in tracking down the suspect, but warned members of the public not to approach him.
They described the man as having “dark skin, short hair and beard” and said he also had a head wound.
The center houses organizations that offer help to people including migrants and asylum-seekers.
Further details were not immediately available. Calls to the centre went unanswered.