In a statement published by state broadcaster IRIB, the Revolutionary Guard said "Iranian forces killed four terrorists and wounded two".
Four terrorists killed in Kalat security operation
Earlier, Iranian President Hassan Rouhani vowed a 'crushing' response after assailants sprayed a crowd with gunfire, shooting dead at least 29 people including women and children at a military parade near the Iraqi border.
Iran says 'militant separatists' behind deadly parade attack
The Islamic State militant group claimed responsibility for the rare assault in the southwestern city of Ahvaz, while Iranian officials accused “a foreign regime” backed by the United States of being behind it.
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