A strong 6.7-magnitude earthquake hit north-central Chile on Saturday, the US Geological Survey said, with police reporting the deaths of two people from heart attacks. The quake struck at a depth of 53 kilometers (33 miles) with an epicenter some 15 km southwest of Coquimbo, USGS said. An elderly man and an elderly woman from Coquimbo suffered cardiac arrests as a result of the quake, police said, while there were several landslides reported on national highways.