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CHICAGO — Chicago police say a demoted worker shot and critically injured his company’s CEO before fatally shooting himself at their office in a downtown high-rise office building.

Police Superintendent Garry McCarthy says a worker at a technological company entered the 17th-floor office Thursday and met with his CEO before pulling a gun.

McCarthy says there was a struggle for the gun, and the CEO was shot twice before the gunman fatally shot himself. Police say the 54-year-old victim was taken to a hospital in critical condition.

The office is in the Bank of America building in Chicago’s bustling financial district. The building is two blocks from the Willis Tower, the country’s second tallest skyscraper, and a block from the Chicago Board of Trade and the Federal Reserve Bank of Chicago.