Interstate 17 at Northern Avenue is open again in both directions in the wake of police activity, the Arizona Department of Public Safety said.
The highway in both directions was closed at 3:30 p.m.
DPS officers said they arrested one person. They did not elaborate on the nature of the arrest.
No other information is available at this time.
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An unknown person has been admitted to a California hospital and tested for a possible Ebola infection.