BALTIMORE (WJZ) – An arrest warrant is issued for a man suspected of attacking a pregnant woman in a Guilford neighborhood.

Rochelle Ritchie has the new information from police.

READ MORE: Buxton's 2-Run Homer In 9th Lifts Twins Over Orioles 3-2

Police say they know who their suspect is and that it’s only a matter of time before they find him and place him behind bars.

It was on the 400 block of Bretton Place where Baltimore County police say a woman, six months pregnant, was attacked and robbed by a teenager Saturday night.

“One of the two suspects punched her in the head a couple of times and stole items from her purse and fled on foot,” said Deputy Commissioner Kevin Davis, Baltimore City Police Department.

Just four days after the attack, Baltimore police say now have an arrest warrant for the person they believe is responsible.

“We cannot identify him this afternoon nor can we show a picture of him only because we suspect that he is involved in several other crimes and robberies that have taken place in the Guilford community,” said Davis.

Police say it was just before 7 p.m. when the woman, a nurse with Union Memorial Hospital, was walking down Greenmount Avenue before turning on Bretton Place to make her way towards the hospital.

READ MORE: 19-Year-Old Man Shot In Baltimore's Upton Neighborhood Saturday, Police Say

That’s when she tells police a teenage boy, about 16 or 17 years old, punched her three or four times in the back of the head, causing her fall to her knees.

Baltimore police say the multiple punches left a welt over the woman’s left eye. She was not immediately taken to the hospital. Her husband did take her to be checked out.

Residents say they are shocked at the crime, but even more so because it was a pregnant woman.

“It kind of makes me lose faith in humanity a little bit. I feel like if someone has to attack someone who’s pregnant, that’s pretty awful,” said Lucy Burchell.

Police say a second person was used as a lookout during the robbery.

“It’s outrageous and unacceptable in this city for a crime like this to take place,” said Davis.

Baltimore police say the suspect stole the woman’s iPhone as well as her debit card. The debit card was later found by a neighbor.

MORE NEWS: Maryland Comptroller Franchot Tests Positive For COVID-19

The mother and her unborn child are said to be doing OK.