Authorities said a man died after a shooting involving a police officer in South Bend, the Indiana city where the Democratic presidential candidate Pete Buttigieg is mayor.

Buttigieg said he changed his campaign schedule to return to South Bend on Sunday and hold a late-night news conference. He said the circumstances of the death would be thoroughly investigated, and called on any witnesses of the shooting to come forward and speak to investigators.

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

Buttigieg canceled a trip on Monday to New York for an LGBTQ event, according to the campaign.

The St Joseph prosecutor’s office, investigating the shooting, said police responded early on Sunday to a call about a suspicious person going through cars. A police officer confronted a man in a vehicle in an apartment building parking lot. The prosecutor’s office says the man exited the vehicle and approached the officer with a knife raised and the officer opened fire.

The man, identified as Eric Jack Logan of South Bend, died later at a hospital. Authorities initially said Logan had been 53 years old, then said he was 54 when he died. An autopsy was scheduled for Monday.

The officer, who was not identified, was treated for minor injuries.

Logan’s wife, Shafonia Logan, told reporters after meeting the police chief on Sunday night that she had many unanswered questions about what happened to her husband of 13 years. She said he called her early on Sunday asking her to pick him up as he was out with friends, but she was in bed and he replied that he would walk to his mother’s house a few minutes away.

“I don’t know what happened or what they say – he was breaking into a car?” she said. “Was that justified for him to shoot and kill him about breaking in a car?”

Buttigieg has had a sometimes tense relationship with the black community in South Bend, dating back to his first term in office, when he fired the city’s first black police chief. He has also faced criticism for his handling of other police-involved shootings.

He said on Sunday he was sometimes hesitant to speak publicly after police-involved shootings earlier in his time as mayor, and that he heard from the black community that he needed to be more open and transparent. He said he planned to meet on Monday with faith and community leaders.

“One of the reasons we’re communicating up front right now is because of lessons learned from members of the community,” he said.

Shafonia Logan said she never knew her husband to carry a knife or a gun and that he was afraid of police officers. She also questioned why her husband was taken to a hospital in a police car, rather than an ambulance.

She said her husband had five children from other relationships.