A magnitude 7.8 earthquake has struck south-east Iran, the US Geological Survey (USGS) reports.
The epicentre of the huge quake was 86km (53 miles) from the city of Khash in Sistan Baluchistan province, near the border with Pakistan.
Tall buildings swayed in the Indian capital Delhi, while tremors were felt across the Gulf and wider Middle East.
At least 37 people were killed and 850 wounded in a 6.3 magnitude quake in south-west Iran on 10 April.
The quake struck south of the country’s only nuclear power station in Bushehr, which operators said was undamaged.
There are no reports yet of casualties or damage.
Mohammad Wazir, a correspondent for BBC Persian in Pakistan, says the quake was felt in the cities of Karachi and Quetta.