One fatality and two injuries were reported early Wednesday morning in a multi-vehicle crash on Interstate 17 near Black Canyon City.
Two collisions occurred on northbound Interstate 17 around 3 a.m. near the Rock Springs exit, said Arizona Department of Public Safety spokesman Bart Graves.
The first crash occurred when two cows wandered onto the roadway, one of which was struck by two vehicles, he said.
"The first car swerved and avoided hitting them. Another vehicle, a pickup truck with three women inside, struck one of the cows and pushed it into the number one lane, where it was hit again. The driver of the pickup truck stopped her vehicle in the middle of the highway and got out of her vehicle," Graves said.
A second collision occurred when the driver of a semi truck stopped to tell the woman to get back into her truck, Graves indicated.
"As this conversation is going on, another semi strikes the parked semi, bursting into flames," Graves said.
The force of the impact caused the first semi to move forward, striking the driver of the pickup truck and killing her, Graves said.
A passenger in the truck was reported in critical condition following the second crash. She was flown by helicopter to a Phoenix-area hospital. The truck's third occupant was transported by ambulance to a Phoenix-area hospital, Graves said.