NBC News is reporting that the person suspected of being responsible for multiple fatalities at an Aberdeen, MD Rite Aid warehouse Aberdeen, Maryland on Thursday, Sept. 20. is down and that the perpetrator is a woman. 

Police were dispatched to the scene in the area of Spesutia Road and Perryman Road, which is about 30 miles northeast of Baltimore, at 9:09 a.m. ET 

We are closely monitoring the horrific shooting in Aberdeen. Our prayers are with all those impacted, including our first responders. The State stands ready to offer any support. https://t.co/fzugpo8C1Z

— Governor Larry Hogan (@GovLarryHogan) September 20, 2018

There is currently no official casualty count. This story is developing.