New Delhi, March 24 -- A strong 7.6 magnitude earthquake struck near the Tonga islands, the U.S. Geological Survey (USGS) said on Tuesday.

The quake took place 153 km west of the town of Neiafu in Vava'u, Tonga, at around 4.30 am UTC, the USGS said.

The quake was at a depth of 237.5 km.

There were no immediate reports of any damage or casualties.

The Tonga National Disaster Risk Management Office issued a tsunami warning for coastal areas and urged people to move inland or to higher ground. It also urged people to bring a 72-hour emergency bag containing drinking water, food, essential medication, and emergency equipment such as flashlights, mobile chargers, and batteries.

"Remain at evacuation centers until given clearance to return...