3:50 p.m. UPDATE

Gunman shot through the glass door to the office and opened fire on multiple employees. Can't say much more and don't want to declare anyone dead, but it's bad.

— Phil Davis (@PDavis_LLC) June 28, 2018

3:35 p.m. UPDATE

Sheriff told Shep by phone that an officer reported over the radio have apprehended a suspect. It was a K-9 unit making the report. Sheriff has not come back on air yet. https://t.co/9V4X6uayUs https://t.co/iM1N9jz87o

— Caleb Howe (@CalebHowe) June 28, 2018

A shooting has been reported at the offices of the Capital Gazette in Maryland. The CG is owned by the Baltimore Sun. An intern tweeted out a desperate call for help at about 2:45 p.m. on Thursday afternoon. At least four fatalities have been reported so far.

Active shooter 888 Bestgate please help us

— Anthony Messenger (@anthonydmess) June 28, 2018

Police have responded.

Not sure what’s happening in #Annapolis but about 40 police vehicles have passed me. Bestgate Rd is blocked at West St. pic.twitter.com/QtItPLoRUZ

— Cheryl Conner Costello (@CherylCCostello) June 28, 2018

BREAKING: Initial reports of 4 dead and multiple others injured after shooter opens fire at the Capital Gazette building in #Annapolis, #Maryland.

— News_Executive (@News_Executive) June 28, 2018

This story is still developing.

This is from an intern at the Capital Gazette in #Annapolis. @WMAR2News is working on getting more information and sending a crew that way. https://t.co/5PCFvDA4Rf

— @skylerhenry (@SkylerHenry) June 28, 2018