You arrived at a scene of an accident where mass casualties are involved. State two types of injuries that will require immediate medical attention.

1. Severe head injuries: Head injuries can be life-threatening and require immediate medical attention to prevent further damage to the brain. This can include traumatic brain injuries, skull fractures, and bleeding in the brain.

2. Severe bleeding: Severe bleeding can lead to shock and death if not treated promptly. This can include external bleeding from wounds as well as internal bleeding from injuries such as broken bones or organ damage. Immediate medical attention is needed to control the bleeding and prevent further complications.