A four-year-old boy found a loaded gun in his family’s house and fired it through the front door, killing his five-year-old sister and seriously wounding another boy.

CNN reported that today’s shooting in a Maryland motel was a domestic dispute and not believed to be related to the sniping attacks.

Police are investigating a shooting at a motel in Maryland’s Prince George’s County – the area where a sniper has claimed eight victims

Parents in the suburbs around Washington anguished over their children’s safety today after a sniper, who murdered six adults last week, critically wounded a schoolboy.

A 13-year-old boy was fighting for his life today, after the Washington-area sniper struck as the boy’s aunt dropped him off at a Maryland school.

A US underground station was closed after several people reported sick following a scuffle between a police officer and a man in which a jar with an unknown substance fell on to a platform.

Two people were killed on the University of Maryland campus and at least 50 others injured when a tornado ripped through suburban Washington.