Condoling the bereaved families, Foreign Ministry Spokesperson Marzieh Afkham on Saturday pinpointed the importance of unity in the Muslim world.
Over 60 people were killed and 50 injured in a bomb attack on a Shia mosque and religious center in Pakistan's southern province of Sindh.
Sources maintained the attack occurred when people were performing Friday prayers in the town of Shikarpur, around 470 kilometers (300 miles) north of the port city of Karachi.
The Foreign Ministry spokeswoman underscored that the terrorist act is against Islam's religious teachings and human values.
Underlining the need for confronting extremism and terrorist currents, she call on regional countries to cooperate in combating extremism and terrorism and safeguarding unity among Muslims.
A number of victims are still trapped under debris, after the roof of the mosque collapsed due to the intensive blast.
Jundullah terrorist group claimed responsibility for the attack, but pro-Taliban militants usually take responsibility for similar attacks in the country.
This is also the last of deadly incidents in a wave of violence against the Shia Muslim community in Pakistan.