The two neighbors have summoned each other's ambassadors to lodge protests over the detention of a Pakistani official in the Afghan city of Kandahar and a deadly cross-border shootout between Pakistani and Afghan border police, officials said Friday. The ministry statement also expressed concern over this week's cross-border shooting incident, in which an Afghan border guard was killed and two Pakistani security officers were wounded. Hours earlier Afghanistan's Ministry of Foreign Affairs had summoned Pakistan's ambassador to protest the June 30 cross-border shooting incident, according to a statement released by Kabul on Thursday.