Apartment Building, Residential Apartment fire extinguished by sprinkler system (Charleston, MD) November 15, 2014 viking210 A fire broke out at an apartment in the Alta Chesapeake Ridge community Saturday night. The Maryland State Fire Marshal Office is investigating the blaze, which occurred in a ground floor unit in building 206 and was reported around 7:50 p.m. on Saturday. Witnesses at the scene reported seeing flames shooting from an exterior wall. The residential sprinkler system extinguished the blaze by the time firefighters arrived, according to officials.