Two explosions are reported outside the Lao capital, Vientiane, as the country prepares to host a major summit of regional countries. Witnesses say the blasts occurred Friday near the border with Thailand. No casualties were reported, and it is not clear what caused the blasts. Laos is preparing to host a two-day summit of leaders from the Association of Southeast Asian Nations and China, Japan, South Korea, India, Australia and New Zealand. The United States has warned that opponents of the Lao government may be plotting bomb attacks in Vientiane and elsewhere in the country during next week's summit. Some information for the report provided by AP and AFP.