There have been about 1,000 mass shootings in the U.S. since a gunman killed 26 children and teachers at an elementary school in Newtown, Conn. three years ago, sparking widespread calls for gun reform legislation.

The Newtown Action Alliance, a group that formed after the 2012 Sandy Hook Elementary School shooting, says in the three years since the tragedy, there have been no congressional reforms on gun laws in the U.S.

As attempts to reform gun laws have repeatedly failed, the group says about 1,000 mass shootings of four or more people have taken place in the U.S.

In an interview on CTV News Channel on the third anniversary of the Sandy Hook shooting, the group's chairperson Po Murray said since the tragedy, 90,000 Americans have been killed by guns and 210,000 people have been injured by guns.

In addition, she said gun violence costs the U.S. $210 billion annually.

"We need to see change to protect our children and families from the gun violence that's happening every single day," Murray said.

On Dec. 14, 2012, a mentally troubled young man entered the school and fatally shot 6 staff members and 20 children. The shooting served as a rallying cry for gun control advocates, including U.S. President Barack Obama.

But officials have been unable to change gun laws at the federal level.

Still, certain U.S. states are beginning to take action on gun laws, Murray said.

She said that in the years following the Sandy Hook shooting, Connecticut has passed the second strongest gun safety reforms in the U.S., and six states have passed bills on background checks needed to buy guns.

"We're seeing progress in the nation state by state, and I think we'll continue to see progress as more and more Americans get fed up with what's happening in our nation," she said.

Meanwhile, some states have move in the opposite direction and expanded gun rights, according to The Associated Press.

Dozens of new state laws have made it easier to obtain guns and carry them in more public places and made it harder for local governments to enact restrictions, according to a review of state legislation by The Associated Press.

Murray said the anniversary of the Sandy Hook shooting serves as an opportunity to talk about ending gun violence.

"We cannot live in a society of fear," she said. "We don't have to have these discussions in the future."

With files from The Associated Press