Two people die after two Australian-owned firefighting helicopters collide mid-air while responding to a wildfire in Greece, according to multiple Australian outlets. The aircraft are described as helicopters operated for fire-fighting operations, and the collision occurs during active fire response. Reporting states that the incident increases the overall death toll related to the disaster. One outlet notes the overall toll has risen to five, indicating additional fatalities from earlier stages of the wider incident. The helicopters are identified in coverage as being owned by an Australian company, underscoring Australia’s involvement in providing aerial firefighting support. Authorities and emergency services are reported to be responding to the crash and investigating the circumstances that led to the collision. The available summaries focus on the deaths, the Australian ownership of the helicopters, the firefighting context in Greece, and the mid-air nature of the crash. The exact identities of those killed and the specific cause of the collision are not provided in the supplied excerpts.