CHICAGO (CBS) — Police and fire crews suspended a search Saturday night for a man who jumped into the Lincoln Park South Lagoon after his dog and did not come out.

Police said around 6:15 p.m., the 29-year-old man jumped into the South Lagoon, located along the eastern edge of the Lincoln Park Zoo, to rescue his dog from the water.

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The dog got out of the water successfully, but the man never reemerged to the surface, authorities said.

Fire Department Scuba Team divers searched for an hour and a half, but could not find him, police said.

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The police Marine Unit was also searching the surface of the lagoon.

Later Saturday night, the search was suspended. The Fire Department believes the search will no longer be a rescue mission, but a recovery mission – meaning they do not believe the man survived.

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The search will resume at 8:30 a.m. Sunday, police said.