CHICAGO (CBS) — One person was killed and an ATF agent was wounded, in an apparent shootout Thursday afternoon in Gary, Indiana.

Lake County Prosecutor Bernard Carter said he was notified an ATF agent was shot in the chest in a shootout near 25th Avenue and Broadway. Another person involved in the shooting died.

ATF officials confirmed they were responding to reports of an agent shot during an operation in Gary.

Authorities were investigating a crash involving at least two cars at 21st and Broadway. Several posts on social media described a chase involving unmarked police cars. It turned out that accident was unrelated to the shooting.

Agents also were seen standing outside a house near 5th and Kentucky in Gary. Part of that street had been blocked off by police, and dozens of officers were seen gathered on the sidewalks.

Last month an ATF agent was shot in the Back of the Yards neighborhood in Chicago. A man has been charged in that case.

Prosecutors allege Ernesto Godinez fired five rounds from a gangway toward the agents down the block, striking one agent in the face.

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