• Boston Marathon 2019: No known threats, but officials stress vigilance


    BOSTON - Just weeks from the 123rd Boston Marathon, police across the Commonwealth are preparing to do their part to keep the event safe. 

    Law enforcement officials say there are no known threats to this month's Boston Marathon but warn against complacence six years after two bombs near the finish line killed three spectators and injured more than 200.

    Federal, state, and city officials held a news conference Wednesday to discuss safety and security at the 123rd running of the race on April 15.

    Four state police helicopters will keep an eye on things from the sky. Surveillance cameras are being placed at strategic spots along the course. Hundreds of uniformed police and National Guard members will patrol the route. An undisclosed number of plainclothes officers will mingle with fans.

    Joseph Bonavolonta, special agent in charge of the FBI's Boston office, said the public is key. He says anyone who spots anything suspicious should report it.

    Watch the event below:

    The Associated Press contributed to this report.

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