The bombings were "an inhuman crime and spiteful act done by Zionists and their mercenaries," ministry spokeswoman Marzieh Afkham said in remarks carried by the official IRNA news agency.
She also confirmed that Iran's cultural attaché in Lebanon Ebrahim Ansari was killed in the bombings.
The blasts killed at least 23 people and wounded nearly 150 others including four al-Alam staff.
BA/BA