NEWPORT — A man has been arrested in connection with robbing TD Bank on March 31, police said Thursday.

Bo H. Rodden, 19, most recently of Berwick, Maine, was being held Thursday morning at the Strafford County jail in Dover, N.H., said Lt. Randy Wing, the investigating officer for Newport Police.

Wing said Rodden was arrested around midnight by police in the Dover area, where he’s facing charges of aiding in the robberies of at least four other banks. Rodden was arraigned and held on $200,000 cash bail. He is due in a New Hampshire court April 21 and an extradition hearing is pending.

Also arrested was an alleged accomplice, Christopher M. Hildreth, 22, of Kittery, Maine, who was being held at the York County Jail in Alfred, Maine. Hildreth is not suspected of being involved in the Newport robbery, Wing said.

The Newport robbery was apparently a test before Rodden robbed banks in New Hampshire, Wing said.

“Up until four weeks ago he lived in Berwick; he’s kind of been floating around for the last four weeks in areas around the Dover, N.H., area,” Wing said. “Initially, he came up here (to Newport) and I believe he wanted to come up in an area where it was likely no one would recognize him.”

The Newport robbery was reported shortly after the bank opened at 9 a.m. on March 31. Police said a male suspect wearing a white “sailor”-style hat walked into the bank and handed a female teller a note indicating that he had a weapon and wanted money. No one at the bank saw a weapon, police said, and nobody was injured.

The man left the bank on foot with an undisclosed amount of money in a bag.

Since then, Rodden and Hildreth were allegedly involved in at least four other area bank heists in New Hampshire.

The most recent bank robberies occurred Tuesday, Wing said, when police allege Hildredth entered a TD Bank in Dover and handed a teller a note and made off with an undisclosed amount of money. About four hours later on Tuesday, a similar bank robbery occurred at a TD Bank in Farmington, N.H.

Rodden and Hildreth are also suspected in robberies of Ocean Bank in Stratham, N.H., on April 7 and a Citizens Bank in Rollinsford, N.H., on Monday, Wing said.

A break in the case came from Kevin Curran, a drug agent with the Maine Drug Enforcement Agency, who received a tip that was investigated last Friday. Wing said he and Curran traveled to Dover on Tuesday, but couldn’t find Rodden.

In one of the New Hampshire robberies, Rodden wore a “bucket-style fishing hat,” similar to the one the suspect wore in Newport, Wing said.

Rodden was arrested on a warrant and on charges of conspiracy to commit robbery stemming from the New Hampshire heists.

Wing, who was on his way to New Hampshire on Thursday, said he still needed to interview Rodden as part his the investigation into the Newport robbery.