One suspect is in custody after stabbing two security guards at a Macy's in Philadelphia, with one of them dead and the other being treated for their injuries.

The workers were rushed to Jefferson Hospital as police responded to the scene, cops said.

The suspect boarded a SEPTA train after the stabbing, transit police said. He was arrested at the Somerset Station by SEPTA police according to the Philadelphia Police Department, which is leading the investigation. 

Police at the scene said the incident began about 15 minutes before they were called, when a man tried to steal some hats. Security guards at the store got into a confrontation with him, retrieved the merchandise and let him go on his way. That same man is accused of returning and attacking the guards.

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"When the male comes back into store, he immediately goes straight towards one of the security guards, and then redirects his attention to a second security guard, runs directly to that security guard with a knife already exposed and begins to stab him," Philadelphia police commissioner John Stafford said. "There's a couple with the second security guard trying to save the first guard that's stabbed, and that security guard sustains several stab wounds, as well."

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Stafford said both security guards were in their 20s, and that one had only been working at Macy's for a few months. The commissioner noted that they were hired by Macy's and were not armed.

The store, located across the street from city hall in center city, has seen high levels of retail theft this year with 250 incidents reported to police. It is currently closed, and any future announcements will come from the company, police said. Macy's did not immediately respond to Fox News Digital's request for comment.