Texas school shooting: Suspect's grandmother upgraded to good condition
Twenty-one were killed and 17 were injured in last week's mass shooting.
A small town in rural Texas was left reeling after a gunman opened fire at an elementary school, killing 19 children.
Two teachers were also killed in the May 24 shooting at Robb Elementary School in Uvalde, according to authorities.
The alleged gunman -- identified by authorities as 18-year-old Salvador Ramos, a student at Uvalde High School -- was killed by law enforcement at the scene.
The suspect allegedly shot and injured his grandmother before opening fire at the school, officials said.
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Shooter purchased 2 rifles days before shooting
Salvador Ramos, the suspect in the Robb Elementary School shooting, after turning 18 on May 16, purchased two rifles and carried out the second-worst school shooting in U.S. history within the span of eight days, according to multiple law enforcement officials.
The suspect purchased two AR-15-style rifles on May 22, two days before the massacre and six days after his birthday, multiple law enforcement officials told ABC News. They were legal purchases.
Once the shooter made entry into a classroom he barricaded himself and opened fire, according to the sources.
Officers from the Uvalde Police Department and agents from Customs and Border Protection entered into the classroom and immediately took fire from the gunman before they shot and killed him.
Investigators are going through the ballistics to determine who fired the fatal shot.
Ukrainian president offers condolences to families of the victims
Ukrainian President Volodymyr Zelenskyy offered his condolences to the families of the victims of the shooting on Twitter.
"Deeply saddened by the news of the murder of innocent children in Texas. Sincere condolences to the families of the victims, the people of the US and @POTUS over this tragedy," Zelenskyy said in a tweet.
Zelenskyy added: "The people of Ukraine share the pain of the relatives and friends of the victims and all Americans."
Matthew McConaughey calls for action after shooting
Actor Matthew McConaughey decried the shooting in his hometown of Uvalde, Texas.
"We have tragically proven that we are failing to be responsible for the rights our freedoms grant us," he wrote in a statement on Twitter.
"We cannot exhale once again, make excuses, and accept these tragic realities as the status quo."
Amanda Gorman pens poem about shooting
The 24-year-old National Youth Poet Laureate took to Twitter following the tragedy to share a poem.
She also posted a series of tweets on gun violence.
“It takes a monster to kill children,” she wrote. “But to watch monsters kill children again and again and do nothing isn’t just insanity -- it’s inhumanity.”
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State senator: 'Every day is 1 day closer to students dying'
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