COLUMBIA, Md. — Police in Maryland say three people died Saturday in a shooting at a mall in suburban Baltimore, including the presumed gunman.

Howard County police said via Twitter that a shooting took place at the Mall in Columbia, a suburb of both Baltimore and Washington.

Authorities received a call to 911 at around 11:15 a.m. from someone reporting that shots had been fired. Police responded to the scene and found three people dead, including one person who was found near gun and ammunition.

Police said they believed that one of people found dead was the shooter. There was no other information available about the two other people.

The scene was “believed to be secure” police said in a tweet issued at about 12:36 p.m.

The mall is at the center of the town, a suburb of both Baltimore and Washington.

The mall typically opens at 10 a.m. on Saturdays and it was not known how many shoppers or workers might have been present at the time of the shooting.