President Barack Obama will attend a memorial service for victims of the mass shooting at the Washington Navy Yard, the White House announced on Wednesday.

Press secretary Jay Carney said that the service would take place on Sunday and said the White House would provide more details.

“The president will want to mourn the loss of these innocent victims and share in the nation’s pain in the aftermath of another senseless mass shooting,” he told reporters.

Aaron Alexis, 34, opened fire at the Navy Yard on Monday, murdering 12 people before being killed by police.

The tragedy has sparked renewed debate on gun control. The president on Tuesday said that Congress should act after the latest shooting.

“This is something that Congress is gonna have to act on," Obama said in an interview Tuesday. "I've taken steps that are within my control. The next phase now is for Congress to go ahead and move."

Obama blamed Republicans for blocking gun control legislation he has pushed in the aftermath of December’s mass shooting at Newtown Elementary School in Connecticut.

You have a majority of the American people and even a large percentage of Republicans who are ready to move the country forward, and yet we keep on getting blocked. And it's a challenge that speaking out on, but ultimately we're also gonna meet pressure from the public to see if we can change how they do business up there,” he said Tuesday.

Obama earlier this year implemented a number of executive actions to tighten enforcement of the nation’s gun laws, but efforts to pass new legislation in Congress have faltered.