MINNEAPOLIS — Eighteen people have been charged in connection with two violent robberies last month in Minneapolis.

Adrian Cooper, 25, of Brooklyn Center, was charged in both incidents. All the adults and juveniles were charged with at least one count of attempted first-degree robbery, first-degree robbery, aiding and abetting first-degree robbery and third-degree riot, according to Hennepin County authorities. All of these charges, expect for the riot charges, are felonies.

Suspects ranged in age from 15 to 27.

According to criminal complaints and juvenile petitions, the initial incident happened on the morning of Aug. 3. Minneapolis Police received surveillance video of an attempted robbery outside of Target Field. The footage shows about a dozen people attempting to take a man’s cell phone, beating and kicking him as they also ripped off his shoes and pants as they went through his pockets.

The man was on the ground and then jumped on, hit with planting pots and run over by a bicycle. The man and all the suspects left before police arrived.

Over the next three weeks, police worked to identify the assailants and by the end of August they had questioned, and in many cases, received partial confessions from the defendants, according to the complaint. Police identified the man who was assaulted and robbed earlier this month and spoke with him.

The second incident happened in the early morning of Aug. 17 near Fifth Street and Hennepin Avenue in downtown Minneapolis.

A man told police he was with friends in a downtown bar but after he left, according to the complaint, he was standing on the corner using his phone when a group surrounded him and attempted to grab his wallet.

The man was kicked and punched until he was unconscious. He later was diagnosed with a concussion. Bystanders came to his assistance but the suspects stole his iPhone, his wallet, keys and $100 in cash. He was later notified by his bank that one of the suspects used his debit card to withdraw $220 from an ATM, according to the complaint. Video surveillance footage also helped authorities to identify 10 suspects in this case.

Four of the suspects in the two robberies were 15 years old and their names and charges are not public. In each of the robberies, a suspect was arrested but not charged.