Grant Avenue was closed between North Park and North 1st avenues because of police activity, according to officials.
Tucson Police Department officials posted on Twitter: "Due to a police action the immediate area both EB and WB on Grant from Park to 1st AV will be closed for about 2-3 hours. Please use alternative routes."
Another notice announcing the road had reopened was sent about 15 minutes later.
Watch KOLD News 13 at 4 p.m. for updates.
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