Hundreds of residents fled the Indonesian port town of Cilacap for higher ground after an earthquake struck south of Java early Monday morning. The magnitude of quake has been estimated by US seismologists at 6.7 on the Richter scale. The US Geological Survey said, the epicentre in the Indian Ocean was 24 kms deep. Initial estimates had put it at 10 kms underground, and 277 kilometres south of the Javanese coast. Indonesian seismologists had earlier put the quake magnitude at 7.1 and issued a tsunami warning, saying the tremor had the potential to cause a killer wave warning the public. The Tsunami warning was later cancelled. No reports of damage or casualties have been reported so far. The US Pacific Tsunami Warning Centre had said that there was no risk of a widespread destructive wave, but there was a very small possibility of a local tsunami. The earthquake epicentre was 241 km from the remote Australian territory of Christmas Island, and the tremor was felt there. No tsunami warning alert was issued for Australia. Geoscience Australia put the quake at 6.7 magnitude.