As police in London respond to a possible terrorist attack near Britain's Parliament on Wednesday evening local time, state police in Massachusetts say they are monitoring the situation.
State police said that while they're not aware of any direct connection between the incident in London and the United States or Massachusetts, they're receiving updates from Homeland Security and the FBI.
U.K. authorities say an attacker drove into pedestrians on London's Westminster Bridge, crashed outside Parliament and stabbed a police officer, all within a span of minutes. Four people, including the attacker and the police officer, are dead and 20 others have been injured.
Police said they are treating the events as a "terrorist incident until we know otherwise."