MADRID, Iowa —
LifeFlight is responding to a crash north of Madrid, the Boone County Sheriff's Office says.
The crash happened on Iowa Highway 17 just before 5:30 p.m.
The road is blocked in both directions.
The sheriff's office said two cars were involved in a head-on collision.
Authorities are still waiting to learn how many people were hurt and the extent of their injuries.

KCCI 8
KCRG Iowa
Bozeman Daily Chronicle Sports
AlterNet
Rolling Stone
CNN Politics
Desert Sun Sports
RadarOnline
The Conversation