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Thousands attend funeral of fallen Boston firefighter, a 43-year-old husband and father of 3

  • Firefighters salute as the funeral procession of Boston Fire Lt. Edward Walsh arrives outside the Church of Saint Patrick in Watertown, Mass., Wednesday, April 2, 2014. Walsh and Boston Firefighter Michael Kennedy died after being trapped while battling a fire in Boston. (AP Photo/Charles Krupa)

    Firefighters salute as the funeral procession of Boston Fire Lt. Edward Walsh arrives outside the Church of Saint Patrick in Watertown, Mass., Wednesday, April 2, 2014. Walsh and Boston Firefighter Michael Kennedy died after being trapped while battling a fire in Boston. (AP Photo/Charles Krupa)  (The Associated Press)

  • Firefighters salute as the funeral procession for Boston fire Lt. Edward Walsh arrives outside St. Patrick's Church in Watertown, Mass., Wednesday, April 2, 2014. Walsh and his colleague Michael Kennedy died after being trapped while battling a nine-alarm apartment fire in Boston on March 26. (AP Photo/Charles Krupa)

    Firefighters salute as the funeral procession for Boston fire Lt. Edward Walsh arrives outside St. Patrick's Church in Watertown, Mass., Wednesday, April 2, 2014. Walsh and his colleague Michael Kennedy died after being trapped while battling a nine-alarm apartment fire in Boston on March 26. (AP Photo/Charles Krupa)  (The Associated Press)

Thousands of firefighters from across Massachusetts and beyond have joined family and friends in paying final respects to a 43-year-old Boston firefighter killed in a nine-alarm blaze last week.

Lt. Edward Walsh died alongside 33-year-old colleague Michael Kennedy when they became trapped by the fire at a Back Bay brownstone one week ago. Walsh was married with three children all under the age of 10.

Thousands of firefighters lined the streets Wednesday outside St. Patrick's Church in suburban Watertown, the site of the funeral Mass.

Walsh will be buried next to his father, a former Watertown firefighter.

The Mass was attended by Boston Cardinal Sean O'Malley. Irish tenor Ronan Tynan sang.

Kennedy's wake is scheduled for Wednesday afternoon. His funeral is Thursday in Boston's West Roxbury neighborhood.