A woman with a handgun shot six co-workers — killing three — at a Rite Aid distribution center in Maryland on Thursday morning before fatally turning the gun on herself, authorities said.

The 26-year-old suspect, whose last known address is in Baltimore County, “reported for her workday as usual” before she opened fire shortly after 9 a.m. at the support facility for the drugstore chain in an industrial park in Aberdeen near Perryman, police officials said.

Armed with a 9mm handgun and several magazines, the woman – who cops say was a “temporary employee” at the facility — started shooting outside the warehouse building before moving inside, cops said.

“We do not at this time have a motive for this senseless crime…there were people shot inside and outside the business,” Sheriff Jeffrey Gahler of the Harford County Sheriff’s Office said at a press conference.

Within five minutes of the shooting, a slew of deputies, officers, troopers and other first responders arrived on the scene.

When authorities found the suspect she was critically injured on the floor with a gunshot wound to her head, police said. She later died at a local hospital.

The three wounded victims are expected to survive, according to police.

The identities of the fatal victims and the suspect were not immediately released.

“There are a lot of questions that still need to be answered in this,” Gahler said.

At an earlier press conference, Gahler noted: “Many people have been affected by the events this morning…There are families irreparably harmed by the events this morning.”

Barry Glassman, the County Executive of Harford County, said: “Unfortunately we’ve become accustom to this … We’ve got a lot of problems in this country to solve to bring these incidents to a closure.”

Officials said the handgun used was owned and registered by the suspect.

Roughly 1,000 employees work at the Rite Aid distribution center where the shooting occurred, a company spokesman said.