An earthquake measuring 6.4 on the Richter scale struck off the eastern Indonesian island of Talaud early on Saturday, but there were no immediate reports of casualties or damage, an Indonesian official said. The quake's epicentre was in the sea 42 km west of Talaud and at a depth of 33 km, staff official Lukito of the Jakarta earthquake centre said. Talaud is between Sulawesi, one of Indonesia's major islands, and Mindanao in the Philippines, and lies around 2,250 km north-east of Jakarta.