Relations between the Khmer Rouge regime and neighboring Vietnam collapsed in late 1978, igniting the Cambodian–Vietnamese War. Vietnam launched a full-scale military invasion of Cambodia in December 1978 and captured Phnom Penh the following month, thus ending the Khmer Rouge regime and the Cambodian genocide. Vietnamese forces sent the Khmer Rouge into exile in Thailand and installed Heng Samrin as the new leader of the restored Cambodia. Residents who had been exiled to farm camps and other Khmer Rouge installations were invited to return to Phnom Penh. Singer Sieng Vannthy, who had survived the genocide, was invited to make an announcement on Cambodia's National Radio station that residents were welcome to return to the city. Those who did not return were considered dead, including musicians.