KALISPELL, Mont. -

Authorities say a second teenager has died following a head-on crash on U.S. Highway 2 northeast of Kalispell.
    
The Missoulian reports (http://bit.ly/11MCfZi) that 17-year-old Kayli Mercedes Wagoner died Friday afternoon following surgery at Kalispell Regional Medical Center.
    
The Montana Highway Patrol says Wagoner was a passenger in a car driven by 18-year-old Mercy Peterson, who died at the scene of the crash reported at about 10:20 a.m. Friday.
    
Police say the vehicle driven by Peterson crossed the centerline into oncoming traffic and smashed into a white minivan. Police say a 72-year-old man and 17-year-old boy in the van received non-life threatening injuries.
    
Police say it's not clear why the vehicle crossed the centerline. The crash remains under investigation.