MINNEAPOLIS (AP) -- Hundreds of people in Minneapolis have been demonstrating after police fatally shot a black man.

City leaders have sought to calm protests over the death of 31-year-old Thurman Blevins Jr.

Mayor Jacob Frey attended a vigil nearing the shooting scene that drew about 250 people Sunday evening. Police Chief Medaria Arradondo appeared at a demonstration where about 300 people assembled earlier in the day at a police precinct.

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Both Frey and Arradondo vowed the investigation would be fair and transparent. Police say Blevins was firing a handgun into the air and ground Saturday night when police were called.

The Minnesota Bureau of Criminal Apprehension is investigating. The agency says Blevins ran from officers while holding a gun, was pursued and shot. Some witnesses say Blevins did not have a gun.