SEOUL, South Korea, Jumada I 11, 1437, Feb 20, 2016, SPA -- Sounds of explosions caused South Korean residents of a front-line island to prepare to evacuate early Saturday, but it was later determined that the noise came from a North Korean artillery drill across the rivals' disputed maritime border, AP quoted officials as saying. The false alarm was indicative of the high anxiety between the Koreas in the wake of the North's recent long-range rocket launch and nuclear test. --SPA 13:11 LOCAL TIME 10:11 GMT www.spa.gov.sa/w