On Friday, Iranian Foreign Ministry spokesman Ramin Mehmanparast also called for an international condemnation of the “criminal acts” and offered his sympathy to the families of the victims of the terrorist attacks.
He referred to the increased killing of Pakistani citizens in recent weeks as “targeted” attacks.
“Undoubtedly, the main objective of this organized and Zionist sedition is to fan the flames of sectarian strife among the Pakistani people, particularly between Shias and Sunnis in this country,” Mehmanparast said.
The Iranian official also urged all countries and international bodies to work towards the eradication of the “ominous phenomenon of terrorism.”
A total of 129 people were killed and 280 wounded in three bomb attacks across Pakistan on Thursday.
Ninety-two people were killed and 200 others wounded in a twin bombing that targeted Shia Muslims in a crowded billiards hall in the western city of Quetta. Earlier in the day, 12 security forces were also killed in a bomb explosion at a security check point in the city.
In another incident, a bomb detonated inside a mosque in the Swat Valley of Khyber Pakhtunkhwa province, northwest of Islamabad, leaving 25 Sunni Muslims dead and 80 others wounded.
Thousands of Pakistanis have lost their lives in bombings and other militant attacks since 2001, when Pakistan entered an alliance with the US in the so-called war against terrorism.
Since late 2009, there has been a surge in militant attacks in Pakistan. Thousands have been displaced by the wave of violence and militancy sweeping the country.
Hundreds of Shia Muslims were killed across Pakistan last year. The attacks targeted many doctors, engineers, high-ranking government officials, teachers, and politicians.