Undersea quakes strike Indonesia

Two undersea earthquakes have struck south-eastern Indonesia but there were no immediate reports of casualties.

A 5.6-magnitude quake hit south of North Sulawesi province followed by aftershocks in the same area, the US Geological Survey reported.

A separate quake of magnitude 5.1 later struck north-east of the Tanimbar Islands in Maluku province, it said.

Last month, a 7.7-magnitude quake off the coast of Java triggered a tsunami that killed more than 650 people.

Initial reports had suggested the magnitude of Tuesday's first quake was up to 6.4, prompting a tsunami warning, but this was later withdrawn.

More than 130,000 people were killed in Indonesia in a tsunami that hit in December 2004.

The country sits on the seismically active Pacific "Ring of Fire" and experiences frequent earthquakes.

On 27 May, a magnitude 6.3 earthquake hit near the city of Yogyakarta in Java, killing more than 5,800 people.