Prime Minister Hun Sen departed Phnom Penh on Wednesday to attend the opening of the 25th Southeast Asian Games in Vientiane. Sri Thamrong, an adviser to the prime minister, told reporters at Phnom Penh International Airport that during his visit to Laos, Hun Sen will also meet with Laotian President Choummaly Sayasone and hold talks with Laotian Prime Minister Bouasone Bouphavanh.