ADEN, June 25 (Reuters) - A correspondent for Saudi Arabia's Al Arabiya television in Yemen was killed when a bomb planted on his car exploded, the network said on Thursday. It said Mohammed Aydah, a Yemeni who reported for Al Arabiya and its sister channel Al Hadath, was killed late on Wednesday in the city of Mukalla, in Yemen's eastern Hadramout governorate. Al Arabiya said Mukalla's security authorities had warned Aydah approximately a month ago that his life was under threat, without elaborating.