Nappanee, Indiana - US Rep. Jackie Walorski and two aides died in a car accident Wednesday when the vehicle they were in was struck by another, according to the Elkhart County Sheriff's Office.

The statement said the crash is still under investigation, but a northbound car with one occupant crossed the center line and collided with the car containing Walorski and two others.

Law enforcement said the others killed in Walorski's car were Zachery Potts and Emma Thomson. In a statement, Walorski's chief of staff said they were on her staff, and professional online profiles for Potts said he served as Walorski's district director, while Thomson's said she was Walorski's communications director.

The driver of the northbound car, who also was killed, was Edith Schmucker (56).

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Walorski (58) is the third member of the House Republican conference to die this year, after representatives Don Young of Alaska and Jim Hagedorn of Minnesota.

A spokesman for House Speaker Nancy Pelosi said she had ordered flags to fly at half staff at the Capitol to mark Walorski's passing.

Republican Whip Steve Scalise called Walorski a "champion for the people of Indiana," in a statement Wednesday.

"She will be remembered for her kindness, tenacity, and commitment to helping others," Scalise said, noting that Walorski had served as a member of his whip team.

House Minority Leader Kevin McCarthy announced Walorski's death "with a heavy heart" in a statement on Twitter.

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Transportation Secretary Pete Buttigieg, an Indiana native, said on Twitter he was "shocked and saddened" to learn of Walorski's death.

"Though we came from very different places politically, she was always prepared to work together where there was common ground, always decent and straightforward, and she cared deeply about her work and her constituents," Buttigieg said.

Walorski had served in Congress since 2012 when she first won the election in Indiana's 2nd Congressional District.

In the 117th Congress, Walorski served as a ranking member of the Ethics Committee, as well as a member of the Ways and Means Committee.