Kampala, Uganda - The United Nations is warning of a growing threat from an African rebel group led by one of the world's most wanted men after the United States and Uganda gave up their pursuit.

The report by the UN humanitarian agency says dozens of rebels with the Lord's Resistance Army briefly kidnapped 61 civilians in northern Congo earlier this month.

The report also says the situation has "gravely deteriorated" in northern Congo's Garamba National Park since the end of regional military efforts against the LRA.

The US and Uganda earlier this year ended military efforts to eliminate the rebel group and capture leader Joseph Kony, who is wanted by the International Criminal Court for war crimes.

The US and Uganda have said the LRA was shrunken and neutralized.