Texas school shooting: Suspect's grandmother upgraded to good condition

As President Joe Biden arrived at the White House Monday, he said he met with victims and their families Sunday for three hours and 40 minutes, adding that their "pain is palpable" and "unnecessary."

The back-to-back mass shootings in Buffalo, New York, and Uvalde, Texas, prompted a group of bipartisan senators to engage in some initial conversations about gun legislation. Biden said he hasn't spoken to Republicans about gun reform. Asked by a reporter if he thinks anything will now be different for Republicans, Biden said he did not know, but that he believes they’ll "take a hard look."

Noting that he has asked for Congress to act on guns, a reporter asked Biden if he has a particular responsibility now to get this done. Biden said he’d continue to take any executive action he can, but admitted that without Congress, he "can't outlaw a weapon" or change background checks.

-ABC News' Armando Tonatiuh Torres-García

Texas state Sen. Roland Gutierrez is counting down the days until the start of the next school year, which he said is 77 days.

Without change, "every day is one day closer to students dying," Gutierrez, a Democrat, told ABC News.

He is among the lawmakers calling on Texas Gov. Greg Abbott to convene a special session to address gun violence.

The senator also mentioned potential plans to tear down Robb Elementary and build a new campus.

"I want what families want. Every person has told me they don’t want to go back. Little kids I’ve met have told me they don’t want to go in that school," he said.

-ABC News' Marcus Moore and Darrell Calhoun

As President Joe Biden left Mass at a Catholic Church in Uvalde, Texas, on Sunday afternoon, he walked over to a crowed of people outside chanting, "Do something."

Biden looked at the crowd and mouthed the words, "We will."

Biden and first lady Jill Biden attended Mass at Sacred Heart Catholic Church. As they entered the sanctuary, Jill Biden reached out and lightly touched the hands of several people seated along the aisle as she and the president made their way to their seat in the first-row pew.

About 600 people attended the service.

The president and first lady were greeted at the church by Archbishop Gustavo Garcia-Siller, according to the White House.

“In the midst of collapse and devastation, we have come once more to this our house. To pray. And to be together," one of the service leaders said as the Mass got underway.

Garcia-Siller invited children to come to the front of the church and sit.

"They passed away. But you are alive," the archbishop told the children, referring to the 19 students and two teachers killed in the attack at Robb Elementary School on Tuesday.

Garcia-Siller told the children that he believes they will help the community heal. He noted how Jesus died and “rose from the dead," and then went to heaven.

“He prepared a place for the 19 little ones we lost,” the archbishop said.

The archbishop said he has experienced the goodness of people in the wake of the horrific tragedy. He reflected on Jesus’ message of peace, saying, Jesus felt fear and pain, but did not become bitter.

Garcia-Siller spoke of the joy of heaven.

“Our children in Uvalde who left us already join in this joy," he said. “Heaven is open for all."

The Uvalde school shooting suspect's grandmother, who was the first person shot in Tuesday's attack, has been upgraded to fair condition, University Health officials tweeted Sunday.

The 66-year-old woman, who police said was allegedly shot in the head by her grandson, is being treated at University Hospital in San Antonio, officials said.

Two young victims who survived the shooting at Robb Elementary School remained in University Hospital on Sunday. A 10-year-old girl was listed in serious condition at the hospital, while a 9-year-old girl was listed in good condition, hospital officials said.