Published: Jul 06, 2013 9:17 PM EDT
Updated: Jul 07, 2013 11:19 AM EDT

BONITA SPRINGS, Fla. - The southbound lanes of interstate 75 in Bonita Springs are back open after a rollover crash Saturday night. Now troopers are looking for the driver that caused that crash.

Two women went to the hospital with serious injuries while investigators try to local another vehicle that may have been a part of the crash.

Just before 8:00, Florida Highway Patrol reported a crash near Mile Marker 118. The crash closed all southbound lanes so a helicopter could land and transport a patient to the hospital.

According to the crash report, an unknown vehicle was traveling south on I-75 in the center lane, towards the Bonita Beach Road exit in the area of mile marker 118. A second vehicle, a Chevy Tahoe, driven by 31-year-old Tiffany Miller was traveling south on I-75, in the inside lane.  The unknown vehicle made an improper lane change in front of the Tahoe, causing the Tahoe to veer to the right towards the west shoulder to avoid a collision.

Tiffany Miller's SUV overturned several times and impacted the west fence. Her passenger 54-year-old Sherri Miller was ejected. The unknown vehicle fled the scene and continued to travel southbound. Tiffany and Sherri Miller were airlifted to Lee Memorial Hospital. Sherri remains in critical condition and Tiffany has been released from the hospital.

The only description of the other vehicle is that it’s a beige van.