A woman was killed and a man was critically injured after they were shot outside the Westfield Mission Valley Mall in San Diego early Tuesday morning.

The female victim called 911 around 1:15 a.m. Tuesday from the parking lot of Macy’s, San Diego Police Lt. Mike Hastings told NBC News.

When police arrived on the scene, they found the woman with gunshot wounds to her head and the male victim with gunshot wounds to his head and torso. Both victims were sitting in a car; their names were not publicly released. Police described both victims as being in their 20s.

The woman was pronounced dead at the scene while the man was taken to a local hospital, the San Diego Union-Tribune reported. The hospitalized victim is in critical condition and is fighting for his life; sources told the paper that he might not survive his injuries.

The investigation into the mall shooting is ongoing.

Although police can’t speak to the victims, “there were some witnesses and they’re being interviewed right now,” Hastings told NBC News.

Surveillance video will also be key to locating a suspect. The person responsible is believed to be a man in his 20s of an unknown race, between 5-feet-9 and 5-feet-11 inches tall. He may have been wearing tan pants and driving a 2008 to 2011 dark gray Honda, according to the Union-Tribune.

“We have a lot of evidence to look at,” Hastings said.

NBC San Diego reported that police are asking for anyone with information on the shooting to come forward by contacting the San Diego Police Department’s Homicide Unit at 619-531-2293 or the Crime Stoppers tip line at 888-580-8477.