HARTFORD, Conn. (AP) -- Parents of two victims of the Sandy Hook Elementary School shooting say they will continue to fight for stronger laws to combat gun violence.

Nicole Hockley, the mother of 6-year-old Dylan, and Mark Barden, the father of 7-year-old Daniel, appeared at a news conference Monday with three members of the Connecticut congressional delegation to mark the two-year anniversary of the shooting that took the lives of 26 students and educators on Dec. 14, 2012.

Both say they believe they are making progress in pushing for new laws and programs to improve mental health care, and strengthen gun laws.

They declined to comment on a lawsuit they and other Sandy Hook families have filed against the maker, distributor and seller of the gun used to kill their children.