Maryland shooting: First picture of female suspect, 26, who lists 'an eye for an eye' as favourite quote

This is the 26-year-old woman suspected of shooting dead three co-workers before turning the gun on herself at a warehouse in Maryland.

Snochia Moseley, named by police following Thursday’s attack, described herself on her Facebook page as a “mellow, silly” type who is sometimes quiet.

In the favourite quotes section, she listed the bible phrase “an eye for an eye, a tooth for a tooth” – widely known as the law of retaliation.

Moseley has been named as the lone suspect in the shooting at a distribution centre for the Rite Store drug chain , where she was a temporary employee.

Harford County Sheriff Jeffrey R. Gahler said a total of seven people were shot in the attack, with the three others expected to survive.

It appears only one weapon was used - a 9 mm Glock handgun that was registered in Moseley's name - and no shots were fired by responding law enforcement officers, he added.

"She had reported for her workday as usual, and around 9 a.m. the shooting began, striking victims both outside the business and inside the facility," Mr Gahler said.

He called it a "senseless crime," adding investigators didn't have any motive immediately after the shooting. The victims have not yet been named.

Krystal Watson said her husband Eric works at the facility and told her the suspect had been arguing with somebody else after a "town hall meeting."

"And she went off," she said. "She didn't have a particular target. She was just shooting."

Rite Aid said in a statement that the centre had been closed temporarily and grief counsellors were being made available to workers.

Mike Carre, an employee of a furniture logistics operation next to the distribution center, said he helped tend to a wounded man who came hobbling in, bleeding from his leg. He called 911 before helping colleagues wrap the man's blood-soaked jeans above his injury to cut off blood flow.

Mr Carre said the man told him the shooter "just came in in a bad mood this morning. He said she's usually nice. But today, I guess it wasn't her day. She just came in to pick a fight with someone."

"She pulled out a gun and she just started shooting at her co-workers."

Worker Walter Zambrano, 64, said he was fortunate that he was in a bathroom when shooting broke out during a 9 a.m. morning break when workers were gathering in a cafeteria. He hid in the bathroom until the shooting stopped, fearing for his life.

The person was "shooting like crazy, bam! bam! bam!" He said. "Everyone was screaming, running this way and that. I didn't know which way to run."