Jakarta, Muharram 26, 1437, Nov 8, 2015, SPA -- An undersea earthquake of 6.0-magnitude struck Indonesia's North Sumatra province Sunday but there were no tsunami warnings issued. According to dpa, National Disaster Management Agency (BNPB) spokesman Sutopo Purwo Nugroho said the tremor was the strongest in Mandailing Natal where it lasted five seconds, causing residents to flee from their homes. There were no immediate reports of damage or victims. The quake epicentre is believed to have been 85 kilometers south-west of Mandailing Natal, at a depth of 96 kilometers. --SPA 17:52 LOCAL TIME 14:52 GMT www.spa.gov.sa/w