Who is Jaish al-Adl, the Sunni group that Iran targeted in an airstrike on Pakistani soil?

Iran's airstrike targeting an alleged outlawed separatist group in the Pakistani border province of Baluchistan has jeopardized relations between the two neighbors and potentially raises tensions in a region already roiled by Israel’s war on Hamas in the Gaza Strip. The South Asian country recalled its ambassador to Iran on Wednesday in protest of the unprecedented attack, though both sides appeared wary of provoking the other. A military response from cash-strapped Pakistan is unlikely because the country’s missile systems are primarily deployed along the eastern border to respond to potential threats from India.