MINNEAPOLIS — Authorities have arrested a man in connection with a bank robbery in southern Minnesota and are investigating whether he is responsible for dozens of other armed bank robberies in the state, the FBI announced Wednesday.

FBI spokesman Kyle Loven said “a lot of indicators” suggest the suspect arrested in connection with Tuesday’s armed robbery of the Rolling Hills Bank in Brewster is the serial bank robber dubbed the “Man in Black.”

Loven wouldn’t get into details, but he said the method used in the Brewster robbery matches the one used by the “Man in Black,” who typically dresses in black from head to toe, covers his face, uses a handgun, demands cash from a teller and then leaves the bank with the money.

The suspect in the Brewster robbery was arrested Tuesday by St. Peter police after he was seen in a vehicle that authorities believe was involved in the holdup. The 49-year-old Minneapolis man was in state custody Wednesday and had not been charged.

Loven said officials are looking at bank robberies that occurred over the last year to see how many can be attributed to the serial robber and whether they can be linked to the man in custody. The “Man in Black” could be responsible for potentially dozens of robberies in Minnesota over the last year, primarily in the metro area, he said.

Meanwhile, Loven said, authorities believe a man who robbed banks in North Dakota and Minnesota in recent days has hit another one in the Twin Cities. The FBI said a Wells Fargo Bank branch in Arden Hills was robbed Wednesday by a man who approached a teller with a note demanding cash.

Loven said authorities believe he is the same man who robbed a Bank of the West branch in Fargo, N.D., on New Year’s Eve and a U.S. Bank branch in Bloomington on Monday.