PHNOM PENH (Phnom Penh Post/Asia News Network): Lao Prime Minister Phankham Viphavanh has urged the Laotian provinces of Champasak and Attapeu to cooperate with Cambodia’s Stung Treng, Ratanakkiri and Preah Vihear provinces to expand ties between the two countries. Laos also agreed to hold regular meetings with border officials to enhance cooperation.