Suicide attacks are being planned by Tibetan militants , Chinese official says . Tibet 's prime minister-in-exile denies allegation . China has been accused of using the region as a base for separatist activities in neighboring countries and to destabilize its neighbors. ( CNN ) -- Pro-Tibet demonstrations threaten to overshadow Beijing 's Summer Olympics .
Suicide attacks are being planned by Tibetan militants , Chinese official says . Tibet 's prime minister-in-exile denies allegation . China has been accused of using the region as a base for separatist activities in neighboring countries and to destabilize its neighbors. Pro-Tibet demonstrations threaten to overshadow Beijing 's Summer Olympics .