“The news of the terrorist bombing in Ankara that killed and injured a large number of innocent people has caused deep sorrow,” Afkham said on Saturday.
She further expressed the Islamic Republic’s condolences to Turkey’s people and government as well as the bereaved families of the victims.
At least 95 people were killed in the twin explosions outside the main train station in Ankara where protesters were gathering for a peace march, according to prosecutors.
Graphic pictures from the scene showed several bodies covered by flags and placards, with bloodstains visible and body parts scattered in the road.
Turkish prime minister's office said 246 wounded people were still being treated, 48 of them in intensive care.
"There was a demonstration," one eyewitness told local television. "I was walking next to a stage rally truck. Right here, behind two banners, an explosion went off. We lay on the ground. The second bomb went off there. There were two bombs but the one that went off here was a very strong one."
The blasts came ahead of a planned political rally by labor unions and aid groups protesting the country's conflict with Kurdish militants in southeast Turkey.