Sen. Chris Murphy said Congress is holding “serious” bipartisan negotiations on legislation intended to curb gun violence.

The potential legislation includes strengthening the gun background check system, mental health resources, and security dollars for schools Murphy said Sunday.

According to The Washington Examiner:

“We’re talking about red flag laws. We’re talking about strengthening and expanding the background check system, if not universal background checks. We’re talking about safe storage. And yes, we’re also talking about mental health resources and more security dollars for schools. A package that really, in the end, could have a significant downward pressure on gun violence in this country,” Murphy told ABC News’s Jonathan Karl. “Maybe that’s the most important thing we could do is just show that progress is possible and that the sky doesn’t fall for Republicans if they support some of these commonsense measures.”

Discussions have been held over the weekend with Sen. John Cornyn (R-TX), among other Democrats and Republicans, and are likely to continue through early next week, Murphy added.

Senate Majority Leader Chuck Schumer turned to Murphy and Sen. Richard Blumenthal (D-CT), both of whom were involved in efforts to pass background check legislation after the shooting at Sandy Hook Elementary School in their home state of Connecticut in 2012, to represent Democrats in negotiations, giving them a 10-day deadline to reach a bipartisan agreement.

Senator Dick Durbin recently told CNN he feels like there has been a shift amongst his colleagues on the issue of gun control.

“I can’t say for certain, but I can tell you I sense a different feeling among my colleagues after Uvalde,” Durbin, the Democratic whip, told CNN’s Dana Bash on Sunday.