A woman was killed following a three-vehicle collision on early Labor Day morning on Interstate 5 in Sacramento, authorities said.

Linda Marie Hufnagel, 53, of Sacramento, was driving a Mazda just after 3 a.m. Monday southbound on I-5 near the Interstate 80 transition when she swerved for unknown reasons and crashed into a U-Haul pulled over on the right shoulder for a mechanical issue, according to California Highway Patrol North Sacramento spokesman Officer Justin Fetterly.

The Mazda then pulled back out into the roadway and became disabled before a Toyota Tacoma collided into it, Fetterly said.

Hufnagel was killed as a result of the crash, authorities said. The Sacramento County Coroner’s Office identified her Tuesday.

The U-Haul driver complained of pain, and the Tacoma driver suffered minor injuries, CHP officials said. Both were transported to a local hospital.

It is unknown if alcohol was a factor, and Fetterly said the cause is under investigation as of Tuesday afternoon.

Debris was in the roadway, and lanes were shut down following the incident, according to law enforcement. The lanes have since reopened.