Authorities said Monday they are trying to figure out who was driving one of two vehicles involved in a serious crash on Interstate 94 in the Lowry Hill Tunnel in Minneapolis that caused a major backup of eastbound traffic late Saturday into Sunday morning.

The wreck occurred about 11 p.m. on the eastbound side of the tunnel, according to the State Patrol.

A Lincoln veered to the right and struck a Subaru in the right lane, the patrol said. The Lincoln spun out of control and came to a rest on a hill outside the tunnel.

Lataija A. Willis, 26, of Brooklyn Park, was in the Lincoln and suffered "life-threatening" injuries, the patrol said. Willis was taken to Hennepin County Medical Center, where she was in serious condition Monday, a hospital spokeswoman said.

No injuries were reported for another occupant of that vehicle, 29-year-old Michael J. Burke, 29.

In a statement, the patrol said, "The crash is still under investigation to determine the driver of the Lincoln."

The two people in the Subaru, driver Gregory A. Rathmann, 41, and Kimberly K. Rathmann, 39, both of St. Paul, were not hurt, the patrol said.