Elizabeth Warren
Elizabeth Warren called for more conversation around gun violence in the wake of the Las Vegas shooting that left 58 people dead. In this photo, U.S. Sen. Elizabeth Warren (D-MA) speaks at a rally to oppose the repeal of the Affordable Care Act and its replacement on Capitol Hill on June 21, 2017 in Washington, DC. Photo by Astrid Riecken/Getty Images

Massachusetts Sen. Elizabeth Warren responded Monday to the mass shooting in Las Vegas that left more than 50 people dead and hundreds injured by tweeting that “thoughts and prayers are not enough” and calling for more conversation around gun violence.

“I’m heartsick for the victims of last night’s massacre in Las Vegas & their loved ones,” she wrote. “I’m heartsick for people in Nevada & across the country who woke up to this news & are worried that their family & friends are ok,” she wrote.

“Thoughts & prayers are NOT enough. Not when more moms & dads will bury kids this week, & more sons & daughters will grow up without parents,” she added. “Tragedies like Las Vegas have happened too many times. We need to have the conversation about how to stop gun violence. We need it NOW.”

Warren wasn’t the only politician to call for action in the wake of Sunday’s shooting. Former Democratic presidential candidate Hillary Clinton also spoke out Monday.

“Imagine the deaths if the shooter had a silencer, which the NRA wants to make easier to get,” she tweeted. “Our grief isn't enough. We can and must put politics aside, stand up to the NRA, and work together to try to stop this from happening again.”

Massachusetts Sen. Ed Markey, another outspoken supporter of gun control, wrote: “The epidemic of #gunviolence in our country is not preordained. It is preventable. It is time #GOP stops blocking #guncontrol legislation.”

“My heart breaks for the victims, their loved ones & all those injured in Las Vegas. I call on Congress to show they care by taking action,” wrote New York Rep. Carolyn Maloney.

Rep. Seth Moulton‏, another Massachusetts politician, tweeted: “As after #Orlando, I will NOT be joining my colleagues in a moment of silence on the House Floor that just becomes an excuse for inaction.”

Warren has been an outspoken supporter of stricter gun control. Warren in June joined Markey and Senate Democrats in a filibuster to persuade Republicans to agree to background checks for gun sales online or at shows and deny firearms to individuals listed on federal terror watch lists, Politico reported at the time.

The Sunday shooting became the worst in modern U.S. history after suspected shooter Stephen Paddock, 64, opened fire on the Route 91 Harvest festival in Las Vegas from the 32nd floor of the neighboring Mandalay Bay Resort and Casino, police said. The death toll as of Monday afternoon reached 58 and well over 500 people were reported injured.