(Screenshot of surveillance videos)

Screenshot of the suspect on surveillance video.

Police have identified the 35-year-old woman stabbed and killed on Tuesday night just before 8 p.m. on the 1400 block of 11th Street NW.

Wendy Karina Martinez was running on the street when she was attacked. She staggered into a carryout restaurant after being stabbed multiple times, where customers tried to render aid and called for help, Police Chief Peter Newsham told reporters at a press conference on Wednesday. Police confirmed to reporters on Wednesday morning that Martinez had died from her injuries.

“It’s very disturbing. You have a young woman out here exercising, it’s a very very safe neighborhood. To have something like that happening, it’s unsettling,” Newsham said.

Martinez was the chief of staff at FiscalNote, a tech company that tracks and analyzes legislation. “The entire FiscalNote family is shocked and deeply saddened,” the company said in a statement on Twitter. “Wendy was an invaluable member of our team and a vibrant member of the community. Our thoughts and prayers are with Wendy’s family and friends.”

Police released video surveillance of the suspect on Wednesday. The Metropolitan Police Department offers $25,000 to anyone who provides information that leads to the arrest and conviction of someone responsible for a homicide in D.C.

Originally, there were thought to be three suspects, but Newsham said there was likely confusion because of people running away from the incident.

The police currently believe the stabbing was a random attack and Martinez did not know her attackers, Newsham said at the press conference. It also did not appear to be a robbery. A knife was recovered at the scene, Newsham said.

“This is one of those unsettling incidents that sometimes happen in large cities, but it seems like a singular incident. What the motive was, we don’t know,” Newsham said at the press conference.

The suspect was described as a black man wearing a mustard-colored shirt and dark sweatpants, and he fled southbound on 11th Street, according to police.

In a Q&A on The Bridge, a networking website, Martinez describes what she likes to do to unwind after work.

“I’m a runner and also love H.I.I.T workouts,” she writes. “After work, you’ll either find me running around the city or at my local (and favorite) studio in DC working up a sweat.”

A woman left flowers at the restaurant Martinez stumbled into on Wednesday morning.

This story has been updated with additional details about Martinez and comment from FiscalNote, and to to more accurately characterize Martinez as a runner rather than a jogger.