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    Pressure cooker discovery prompts bomb squad response

    Police brought in bomb squads and closed surrounding streets after a pressure cooker was discovered Thursday morning along the banks of the Muddy River near Kenmore Square, but the small appliance was apparently not an explosive device, authorities said.

    State Police were notified of the suspicious item at about 11:40 a.m. The Boston Police bomb squad was on the scene shortly before noon to secure the device, said State Police spokesman David Procopio. The State Police bomb squad also responded.

    Commonwealth Avenue and Beacon Street at Charlesgate were closed, along with the Bowker Overpass, State Police said.

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    The device was disabled at around 12:40 p.m., and all roads were reopened, State Police said.

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    The pressure cooker did not appear to have been an explosive device, but the incident is under investigation, State Police said.

    The Boston Marathon bombers allegedly used pressure cookers to make their two explosives, which killed three and injured 260 others on April 15.

    The suspects, Dzhokhar and Tamerlan Tsarnaev, also allegedly hurled a pressure cooker bomb during a confrontation with police in Watertown several days after the bombings.

    Tamerlan Tsarnaev was killed during the confrontation. Dzhokhar Tsarnaev faces federal charges that could bring him the death penalty.

    Melissa Hanson can be reached at melissa.hanson @globe.com. Follow her on Twitter @Melissa__ Hanson.