Mayor Pete Buttigieg ​changed his campaign schedule to return to South Bend, Indiana, after a man was killed in a police-involved shooting early Sunday.

​Buttigieg, a 2020 Democratic presidential candidate, canceled ​a trip to New York City, where he was to appear Monday at the Democratic National Committee’s annual LGBTQ gala.

​He held a ​news conference with South Bend Police Chief Scott Ruszkowski late Sunday, ​when they announced the police officer would be placed on paid administrative leave, WNDU-TV reported.

Buttigieg called on witnesses to come forward and said the circumstances surrounding the shooting would be fully investigated.

“We will be striving to reach out to community members,” ​he said.

​Law enforcement officials said the officer responded around 3:30 a.m. Sunday to a call about a suspicious person going through cars. ​

The officer confronted a man in a vehicle in a parking lot.

The man, carrying a knife, approached the officer, who opened fire.