The suspect who robbed an east Anchorage bank at gunpoint in December is believed to have struck again on Monday night, authorities say.

Federal Bureau of Investigation spokesperson Staci Feger-Pellessier said just before 5:30 p.m. the First National Bank of Alaska on Muldoon was robbed at gunpoint for the second time in two weeks.

"The suspect entered the bank with his gun drawn, pointed it at a teller and demanded cash. He then left the bank on foot with an undisclosed amount of money. No one was hurt in the incident," Feger-Pellessier wrote in a release.

She went on to say that the same man is believed to have robbed the same bank on December 27-- dressed in a similar outfit.

An armed man robbed the First National Bank Alaska branch on Muldoon Road in Anchorage on Wednesday, Dec. 27, 2017. (From FBI)

"He was dressed in black pants, black jacket, black hat and shoes with a green scarf covering his face," Feger-Pellessier said.

Feger-Pellessier said Tuesday that agents have “no idea” why the robber would hit the same bank branch so soon after the first robbery. She couldn’t recall a similar federal case in recent memory of robbers targeting the same bank branch.

“We are looking for the suspect right now,” Feger-Pellessier said. “We know it's the same guy who robbed the bank a couple weeks ago.”

Feger-Pellessier declined to say whether the bank or the FBI had stepped up security at the location in response to the robberies.

Anyone with information is asked to call FBI at 907-267-4441.

Copyright 2018 KTVA. All rights reserved.