Iranian border guards have repeatedly come under attacks by terror outfits active on the Pakistani soil.
The Jaish ul-Adl terrorist group kidnapped late on Monday 14 Iranian border guards in the Mirjavaveh border region with Pakistan.
The group kidnapped was involved in "a security operation" and included two members of the elite Revolutionary Guard's intelligence unit and seven members of the Basij force, a volunteer wing of the Guard, as well as regular Iranian border guards, said the Young Journalists' Club (YJC), a state-owned news website, in an article that was later deleted. The area, which lies on a major opium trafficking route, has seen occasional clashes between Iranian forces and Baluch separatists, as well as drug traffickers.
An al-Qaeda-affiliated group known as Jaish al-Adl claimed responsibility for the attack.
In a previous abduction, the militant group killed an Iranian officer and released four soldiers after holding them for almost two months.
Qassemi noted that the Pakistani envoy expressed his deep regret over the incident and said he would inform Iranian officials about his country's measures as soon as possible.
The abduction was carried out by "infiltrators linked to anti-revolutionary groups", the Guards said in a statement on their website.
Mohammad Pakpour, the commander of the IRGC Ground Forces, proposed a joint military operation with Pakistan against "hooligans" to release the kidnapped forces. He said Pakistani side needs "to assume more responsibility in this regard".
The Guard also asked Pakistan to take action to secure its side of the border.
In September, militants disguised as soldiers opened fire on a military parade in Iran's oil-rich southwestern city of Ahvaz, killing 24 people and wounding over 60. Riyadh has denied any involvement in Iranian internal affairs.