 An earthquake of 5.3 magnitude hit Mizoram in the early hours of Monday, causing damage to houses and cracks on roads at several places, an official said.No casualties have been reported, the official of the state Geology and Mineral Resource Department said. Quoting the National Centre for Seismology, he said the earthquake occurred at 4.10 am and the epicentre was at Zokhawthar in Champhai district on the India-Myanmar border. 