Seismologists say a major earthquake has struck a region near the Iran-Pakistan border, less than a week after a quake in Iran killed at least 37 people.

The U.S. Geological Survey says the 7.8 quake struck the slightly populated region. There were no immediate reports of injuries, but the quake was felt as far away as New Delhi and Gulf cities of Dubai and Bahrain. The USGS report says Tuesday's quake was at a depth of 15.2 kilometers (nine miles).

Across the Gulf, high-rise buildings swayed and officials ordered evacuations. Dubai has the world's tallest tower, the 828-meter (2,717 -foot) Burj Khalifa.

Last week, a deadly 6.1 magnitude quake about 96 kilometers (60 miles) southeast of Bushehr, the site of Iran's reactor.