A large 6.9-magnitude earthquake has struck a sparsely populated area of central Peru, the U.S. Geological Survey said Sunday.

There were no immediate reports of damage or injuries, said Mario Casareto, spokesman for Peru's fire agency. He said authorities were still surveying the region, including the Ayacucho area where the quake was centered.

The seismological service initially reported the magnitude as 7, but revised it downward to 6.9 in a subsequent report. According to the survey's updated figures, the quake occurred at 2321GMT Sunday and was centered about 43 kilometers (27 miles) east-northeast of an area called Tambo, and about 467 kilometers (290 miles) southeast of the capital of Lima. It had a depth of 101 kilometers (62.8 miles), the survey said.

Local media said that the quake was felt in parts of Lima and in many major cities of southeastern Peru, including Cuzco and Arequipa.