UPDATE: Two people were flown by air ambulance following a head-on injury crash Sunday night on US-50 between Glenbrook Road and State Route 28, west of the Spooner Lake Recreation Area. Two people with serious injuries were taken by air ambulances to a local area hospital. One person was taken by ground ambulance to local area hospitals with unknown injuries. Lane closures will be adjusted as needed to facilitate the crash investigation and clearing of the crash scene, according to NHP. It is unknown at this time how many injuries, but at least one person was flown by air ambulance and three additional ground ambulances were called to the scene, according to NHP.