The wreck that killed Rep. Jackie Walorski and three others was caused when the vehicle carrying the congresswoman crossed the center line, an Indiana sheriff's office said.

Walorski, 58, communications director Emma Thomson, 28, and district director Zachary Potts, 27, were all killed in a Wednesday head-on collision in Elkhart County, Indiana.

Edith Schmucker, 56, the sole occupant of the colliding vehicle, was also killed. Elkhart County Sheriff's Office released updated information Thursday that corrected what the office initially said Wednesday. 

All occupants of both vehicles were wearing seat belts, the office said, and Potts was driving the Toyota RAV4, with Walorski and Thomson as passengers.

INDIANA GOP CONGRESSWOMAN JACKIE WALORSKI KILLED IN CAR CRASH

"The information from the preliminary investigation at the scene, as to the direction of travel of the vehicles, was not correct. The continuing investigation has located eyewitness and video evidence," the sheriff's office wrote on social media.

Jackie Walorski crash scene

Rep. Jackie Walorski was killed in a car accident on Wednesday afternoon in Indiana (WSBT-TV)

"The Toyota RAV 4 crossed the centerline for reasons that are unknown at this time and the two vehicles collided," the office continued. "The Sheriff’s Office is continuing to interview witnesses and collect evidence from the scene and vehicles."

REPUBLICANS, DEMOCRATS REACT TO REP. WALORSKI'S TRAGIC CAR CRASH DEATH: ‘JUST THE WORST NEWS’

Indiana Republican Rep. Jackie Walorski speaks at the US Capitol in 2018

FILE - In this July 19, 2018, photo, Rep. Jackie Walorski, R-Ind., speaks on Capitol Hill in Washington. (AP Photo/J. Scott Applewhite, File)

Photo of Emma Thomson

Rep. Jackie Walorski's Communications Director Emma Thomson (Fox News)

Lawmakers from both sides of the aisle shared their condolences after the tragic deaths of Walorski and the two staff members.

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Walorski represented Indiana's 2nd Congressional District since 2013 and was known as a bridge-building moderate.