An earthquake measuring 6.4 on the Richter scale struck shortly after midnight Monday (local time) off the Indonesian coast, the U.S. Geological Survey reported.

The quake, initially reported as magnitude 6.7, occurred at 12:02 a.m. (11:02 a.m. Sunday EST). It hit 25 miles west-northwest of Raba on Sumbawa island and 810 miles east of Jakarta.

Reports from the region said at least 17 people were injured, two seriously. There were no immediate reports of damages.

No tsunami warning was issued although the Japan Meteorological Society said there was a "very small possibility" of a destructive tsunami in the Indian Ocean.

On Sunday, another quake, this one measuring 6.1, hit 110 miles from Bengkulu on Sumatra.

A devastating tsunami triggered by a massive 9.1 earthquake off the Sumatra coast in December 2004 killed more than 280,000 people in the region, according to the USGS. It was the fourth largest earthquake in the world since 1900, the agency said.