The United States has conducted cross border raids from Afghanistan against insurgent without obtaining permission from the Pakistani government.
Washington has accused Pakistan of not trying hard enough to rid the Taliban and al-Qaeda from its territory.
Pakistan Would Fire on Intruders
New York Times - 3 hours ago
By SALMAN MASOOD and GRAHAM BOWLEY ISLAMABAD, Pakistan - The Pakistani military said on Tuesday its troops would fire on foreign forces if they crossed the country’s borders but denied that this was a change of policy.
Video: Pakistani Troops Ordered to Fire It US Raids AssociatedPress
Pakistan in border warning to US BBC News