BOSTON (AP) — A special service on Boston Common is honoring people who died in service to the nation since the Sept. 11 terror attacks.

On Thursday morning, their 170 names will be read as flags are placed in their honor at a ceremony attended by Gov. Deval Patrick and other officials and family members.

The event sponsored by the Massachusetts Military Heroes Fund is part of a larger volunteer effort planting nearly 33,000 8-by-12-inch flags on the Common to honor Massachusetts' war dead from the Civil War to the present.

More than 300 volunteers began placing the flags on Wednesday and others will watch over the flags through the Memorial Day weekend.