MEXICO CITY — A magnitude 7.6 earthquake shook the Caribbean Sea southwest of the Cayman Islands on Saturday, according to the U.S. Geological Survey, and some islands and countries urged people near the coastline to move inland in case of a tsunami.

The quake struck at 6:23 p.m. local time in the middle of the sea and had a depth of 6.2 miles, the U.S. Geological Survey said. Its epicenter was located 130 miles south-southwest of George Town in the Cayman Islands.

The U.S. National Tsunami Warning Center said there is no tsunami alert for the U.S. mainland but issued a tsunami advisory for Puerto Rico and the U.S. Virgin Islands, which was later canceled.

The sounding of alarm in Puerto Rico’s northwest region caused people to leave coastal areas and caused heavy traffic, according to local media. Hazard Management Cayman Islands urged residents located near the coast to move inland and to higher ground.

— The Associated Press