Strong earthquake with a preliminary magnitude of 5.6 hit undersea near Indonesia's Sumatra Island, officials said Friday.
There were no immediate reports of damage or injuries.
The undersea earthquake rocked Indonesia's Sumatra town and western Java island. Officials said it had a preliminary 5.6 magnitude and was centered 14 kilometers (8 miles) undersea in the Sunda straits, about 150 kilometers (90 miles) west of Jakarta.
A resident in one of the nearby towns said there was no sign of significant damage, though many residents were frightened by the jolt, reports the AP.
Both Russia and Ukraine have been increasing their military presence on the border between the two countries lately. Russia warned Ukraine against any military scenarios