NEWTOWN, Conn. (AP) -- Flags are flying at half-staff across Connecticut in honor of the 26 people killed three years ago in the Sandy Hook Elementary School massacre.

Monday is the anniversary of the attack in which a gunman killed 20 first-grade children and six educators after shooting his way into the school on the morning of Dec. 14, 2012. The shooter also fatally shot his mother inside their home and killed himself after the rampage.

Houses of worship are holding memorial services, but the town is not planning any events to mark the anniversary. An interfaith community service at a Newtown church Monday evening is expected to include prayers, music and the lighting of candles.

Local groups are offering counseling and support services for residents who might want to use them Monday.