Sept 6 (Reuters) - An earthquake with a preliminary magnitude of 6.3 hit central Ecuador late on Thursday, the U.S. Geological Survey said.

The quake hit 94 km (58 miles) south of the city of Ambato at a depth of 112 km (69 miles), the USGS said. There were no immediate reports of casualties or damage. (Reporting by Paul Tait Editing by Shri Navaratnam)

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