Authorities are seeking information about a man who is suspected of robbing two banks in the District over the summer.

The first robbery took place on July 18 at the PNC branch located at 650 Pennsylvania Avenue SE, in the Capitol Hill neighborhood. In that incident, a man entered the bank and verbally demanded money. After the teller gave him some currency, the robber fled the scene, authorities said.

The second robbery took place on Aug. 1 at the Capital One bank located at 210 Michigan Avenue NE, near Catholic University. In that incident, the culprit approached a bank employee, demanded money and obtained some, police said.

The robber has been described as a black man in his late 40s. In both incidents, the man appeared to be wearing prescription sunglasses and dark-colored shoes.

In the July 18 robbery, the man was also seen wearing a blue New York Yankees baseball hat, grey pants and a light blue shirt with a dark collar.

In the Aug. 1 incident, the culprit was wearing a black baseball cap with a white "Tiger Woods" logo, a white crew neck T-shirt and grey sweatpants.

Shortly after the incidents occurred, D.C. police and the FBI released surveillance photos from the robberies.

"When a subject pursues a second robbery, it raises law enforcement's concern for the subject's intentions of hitting again and their propensity for violence," FBI spokeswoman Lindsay Godwin said Monday.

Anyone with information can call D.C. police at 202-727-9099 or the FBI at 202-278-2000.