The Iranians resorted to firing in Mand area on the border which Pakistan shares with their Sistan-Balochistan province yesterday.
A paramilitary Frontier Corps (FC) official said the firing continued for hours, resulting in death of an FC Subedar while three other personnel were wounded.
"The FC personnel were chasing miscreants when they came under attack from Iranian forces. It was a targeted attack on Pakistani forces," he added.
One FC vehicle was also destroyed in the Iranian firing.
Iran blames Pakistan-based militant groups of frequently attacking its forces.
FC Inspector General Maj Gen Ejaz Shahid warned of retaliation in the future.
"Pakistani forces will respond to Iranian forces in the future, if they carry out any attack on Pakistani territory," he added.
Foreign Office spokesperson Tasnim Aslam yesterday said that Pakistan and Iran had a mechanism to deal with the threat of terrorism.
"We believe that if Iran has evidence that elements from Pakistan are involved in activities against Iran, they should share it with us," she added.
