The UN envoy in Kosovo has condemned an attack on a home in the northern city of Mitrovica that killed a father and injured two of his children.
All the victims of the April 8 blast were ethnic Albanians.
The UN envoy in Kosovo, Farid Zarif, said further acts of violence could not be tolerated as they "can only threaten Kosovo's peace and stability."
He called for full cooperation to find those responsible for the attack on the Haradinaj family.
Ethnic Serbs make up most of northern Kosovo. They have not accepted Kosovo's 2008 unilateral declaration of independence.