(CNN) An 6.5 magnitude earthquake struck off the coast of Costa Rica on Sunday night, the US Geological Survey (USGS) said. The quake was centered 16 km west of Jacó, Costa Rica, at a depth of 10 km, according to the USGS . The observatory at the Universidad Nacional Costa Rica said the earthquake measured 6.9. Jacó lies southwest of Costa Rica's capital, San Jose, and is part of the region of Puntarenas, on the Pacific Coast. Emergency response agencies activatedThree people suffered fatal heart attacks that coincided with the time of the earthquake -- two in Jacó and one person further south in Coronado -- according to a statement from Costa Rica's presidency.

Source: CNN November 13, 2017 02:48 UTC