The discrepancies and apparent backtracking in the Iranian reports could not be immediately reconciled, but Iran has faced two large quakes in less than week and authorities could seek to downplay casualties.
Iran's state-run Press TV initially said at least 40 people were killed on the Iranian side, but later removed the figure from its website and news scroll. Other state-controlled outlets, including the official IRNA news agency, mentioned no deaths and only injuries, quoting a local official.
The website of Tehran Geophysics Center said the quake, measured at least magnitude 7.7, lasted 40 seconds and called it the strongest in more than 50 years in one of the world's most seismically active areas. Press TV called it "massive."
It also was the second deadly quake to hit Iran in less than a week after a magnitude 6.1 temblor struck near Bushehr, on Iran's Persian Gulf coast, killing at least 37 people and raising calls for greater international safety inspectors at Iran's lone nuclear reactor nearby.
Press TV said the quake was centered near Saravan, about 50 kilometers (26 miles) from the Pakistani border. The U.S. Geological Survey put the preliminary magnitude at 7.8 and at a depth of 15.2 kilometers (nine miles).
Press TV said least 40 people were killed, but gave no other immediate details on the extent of damage or casualties. Later, the reference to the death toll was dropped from Press TV's website and the news agency IRNA said only that at least 27 people were injured.
Image: Pakistanis are pictured outside after evacuating nearby buildings following tremors in Karachi on April 16, 2013.Text and Images: Agencies