US Special Forces have conducted multiple raids into Pakistani territory, local daily The Nation reported today in a front-page article that was basically just quoting an earlier Guardian story.
One previous US raid that occurred in 2008 was already known about. And when it happened, there was serious concern as to whether such actions by the Americans might lead to the breakdown of the Pakistani army. One respected London-based Pakistan academic said if American troops kept crossing into Pakistani territory he could envisage a situation where Pakistani commanders would lose control over soldiers who would want to fight the incursions.
That might explain this comment:
"The Pakistanis were kept entirely in the dark about it. It was one of those things we wouldn't confirm officially with them," said the source, who had detailed knowledge of the operations."
Read the original Guardian story here.