Hartford — The families of 11 people killed in the Newtown shooting rampage are making it known that they have no association with a gun control group behind a Tim McGraw concert this summer.

The July 17 concert in Hartford, Connecticut, is benefiting Sandy Hook Promise, an advocacy group that involves several victims' families and is at times wrongly assumed to speak for all 26 victims' families.

The 11 families said in a statement issued Wednesday to The Associated Press that they decided to clarify the issue for donors who may believe they are directly supporting the victims' families. They said their statement isn't related to a position on the gun debate or other issues surrounding the tragedy.

A gunman killed 20 children and six educators at the school Dec. 14, 2012.