ISLAMABAD (AP) — Key Pakistani institutions have snubbed a United Nations team invited by the government to investigate thousands of people who were allegedly detained by law enforcement and intelligence agencies and are said to be still missing.

The group pressed the government and judiciary to do more tackle the problem of missing persons as it ended a 10-day research trip Thursday. But the lack of cooperation it received raises questions about how much impact the visit will have. The Supreme Court, military and main spy agency refused to meet the group.