Foreign Sectary Salman Bashir called Munter to foreign office Islamabad.
Foreign Secretary conveyed strong condemnation to the US Ambassador and has demanded an apology and explanation, said in a statement which was released by FO.
FO said that Pakistan was not a client state and such attacks were unacceptable.
FO said that Pakistan pulled out from Brussels summit in protest of drone attacks insight Pakistan territory. Brussels is hosting Pak-Afghan-US summit on March 26 this year.