DETROIT (WWJ) – A total of 31 arrests were made Friday by the Detroit Police Department in a blitz they’re calling “Operation Restore Order: Rush Hour.”

The citywide crackdown of criminals taking part in illegal drug and firearm sales, plus those with outstanding warrants, involved 12 misdemeanors and 19 felony arrests, police said.

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With uniformed and plain clothed officers, supported by various units within the department and partnering agencies, at work on both the city’s west and east sides — 478 moving violations were issued, 52 vehicle were impounded and 50 gas stations or party stores were inspected as part of the day-long operation.

On the drug bust front: approximately 40 grams of cocaine, over 18 grams of heroin and eight guns were confiscated.

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Police said “Rush Hour” was initiated due to a spike in non-fatal shootings and robberies across the city.

“The goal of the operation was to provide a safe environment for all law-abiding citizens and to purge the community of individuals who have outstanding warrants, participate in the sale of illegal narcotics, and/or possess illegal firearms,” the DPD said, in a statement.

“The Detroit Police Department is committed to reducing crime within the communities and improving the quality of life among Detroit residents. We will continue our efforts in removing the criminal element from our neighborhoods and reducing the fear of crime as a result of criminals preying on citizens.”

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The names of those in custody and specifics of the charges were not immediately released.