Pakistani police said they arrested five US citizens Wednesday in a raid in the east of the country, but declined to give a reason for the detentions.
The men were picked up at a house in Sarghoda in Punjab province, police officer Tahir Gujjar said. He said three of the men are of Pakistani descent, one is of Egyptian descent and the other is of Yemeni heritage.
US Embassy spokesman Rick Snelsire said officials there were aware of the reported arrests, but could not confirm them.
A report on the Web site of the Pakistani newspaper The News said one only one of the men was American.
Quoting a senior police officer, the report said it "was quite a possibility that they (the five men) were engaged in acts of terrorism."