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A strong 8.0-earthquake struck northern Peru in the early hours of Sunday, sending residents fleeing from their homes but there were no immediate reports of injuries.
The US Geological Survey said the epicenter was at a depth of 110 kilometers (68 miles).
The quake hit at 0741 GMT about 75 kilometers southeast of the town of Lagunas, along the Amazon basin near the border with Brazil.
"Some casualties and damage are possible and the impact should be relatively localized," USGS said in a preliminary assessment.
Quakes of similar depth "typically cause less damage on the ground surface (but)... may be felt at great distance from their epicenters," it later added.
The tremors were felt in northern and central Peru, including the capital Lima.
Seismologists at the Geophysics Institute of Peru said the quake, which lasted just over two minutes, measured 7.5 magnitude, revising an earlier assessment of 7.2 magnitude.
Peruvian President Martin Vizcarra urged citizens "to remain calm" in a message on his official Twitter account.
"We're evaluating the affected areas," he said.
Initial reports on Peruvian television said some damage to buildings occurred in the city of Yurimaguas, close to the epicenter, but no injuries had been recorded.
"Based on all available data... there is no tsunami threat because the earthquake is located too deep inside the earth," the US-based Pacific Tsunami Warning Center said.
In February a quake measuring 7.5 with its epicenter in neighboring Ecuador rattled the coast and Amazon region of northern Peru.
It left nine people injured and caused damage in Ecuador, but Peru was unscathed.
Peru is located in a seismically active region, and on January 14 last year a quake measuring 7.3 killed two people and toppled buildings near the southern city of Arequipa.
Peru failed to capitalise on a ten-man Brazil 20 minutes from time — after Gabriel Jesus was sent off for a second yellow — leaving Tite’s charges holding on to win the Copa America 3-1 in front of boisterous home fans on Sunday.
The hosts took the lead after 15 minutes thanks to some brilliant skill from Jesus on the wing.
The quake hit at 7:02am local time, at a depth of 218 kilometres, according to the USGS, sending people fleeing into the streets.
Authorities estimated there were at least 600 injuries so far, and Little Rock police were transporting people to hospitals as there were not enough ambulances to respond, according to local media outlet KTHV.
Thousands of people have gathered at flour distribution centres set up across the country, some as part of a government-backed programme to ease the impact of inflation.
The pope, 86, was taken to Rome's Gemelli hospital three days ago after complaining of breathing difficulties. He has responded well to an infusion of antibiotics, his medical team has said.