An earthquake measuring 7.5 on the Richter scale struck Iran's southeastern Sistan and Baluchestan Province, reported Press TV citing the Iranian Seismological Center.
The epicenter of the quake was 81 km north of Saravan city.
However, the United States Geographical Survey reported that the quake measured 7.8 on the Richter scale.
The quake was felt in Pakistan, UAE and India.
At least five killed and several injured in earthquake in Balochistan province in Pakistan.
Hundreds of people rushed out of their offices and homes in panic today after an earthquake hit the Iran-Pakistan border had ripples felt in Pakistan's biggest city and in cities across the Sindh and Baluchistan provinces.
The epicentre of the earthquake was somewhere at the Pakistan-Iran border.
The worst affected areas, apparently, were Clifton, near the Arabian coastal area, and the densely populated Gulistan-e-Jauhar area where there are hundreds of high-rise buildings.
Jolts were felt around 3.46 pm local time that lasted for around 15 seconds.