Foreign Ministry Spokesman Bahram Qassemi on Tuesday extended condolences to the Pakistani government and nation over the deadly attack.
He also underscored that such “inhumane and barbaric” moves could by no means weaken regional nations’ resolve to fight against terrorism.
“The Islamic Republic of Iran will always stand beside Pakistan’s government and people in the battle against terrorism,” the spokesperson added.
A powerful bomb blast ripped through a protest in Lahore on Monday, killing at least 13 people and wounding at least 83 others.
The explosion went off in Lahore's busy Mall Road during a rally attended by hundreds of pharmacists protesting against changes to a drug sale law outside the provincial assembly building.
Jamaat-ul-Ahrar, a Pakistani Taliban-linked armed group, claimed responsibility for the attack.
The militant group has also warned that the Lahore attack was the start of a new campaign against government departments.