An advocacy group that was formed after the 2012 Sandy Hook school shooting held a candlelight vigil and rally for the victims of Sunday's shooting in Las Vegas.

The Newtown Action Alliance held the event outside the National Shooting Sports Foundation on Mile Hill Road to demand action from President Donald Trump and Congress while fighting the gun industry's efforts to "weaken gun laws."

The national grassroots organization says its mission is to curb gun violence in this country and push for common sense gun laws. The alliance says it is also sending its support to all the victims and their families in the Las Vegas shooting.

"We want to demand action to end gun violence, and the National Shooting Sports Foundation is the second-strongest gun lobby in the nation," says Po Murray, of the Newtown Action Alliance.

National Rifle Association members also attended the event to voice their concerns.

"I'm disappointed that it's so soon," says NRA member Holly Sullivan. "We have no official information as far as what was used, how it was obtained, whether it was legal, illegal and to already be politicizing it is really heartbreaking because there are a lot of families that are still suffering."

The Newtown Action Alliance held a similar vigil and rally after the mass shooting last year in Orlando, Florida.

The National Shooting Sports Foundation says it does not want to comment on the Las Vegas attack, but in a statement said, "Our thoughts and prayers are with the families of those killed and injured in Las Vegas."