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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Biden addresses 'horrific' mass shooting
President Joe Biden addressed the nation Tuesday night following the mass shooting in Texas -- not even two weeks after he mourned victims of the mass shooting in Buffalo, New York.
"I’d hoped, when I became president, I would not have to do this again," Biden said. "Another massacre. Uvalde, Texas. An elementary school. Beautiful, second-, third-, fourth-graders."
"As a nation, we have to ask when in God's name are we going to stand up to the gun lobby," he said. "I am sick and tired of it -- we have to act."
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Connecticut Sen. Chris Murphy pleads with lawmakers after shooting
Connecticut Democrat Chris Murphy gave an impassioned argument on the Senate floor to his colleagues late Tuesday afternoon, hours after 21 were killed in the mass shooting.
"What are we doing?" Murphy asked the chamber. "There have been more mass shootings than days in the year."
"Our kids are living in fear every single time they set foot in the classroom because they think they're going to be next. What are we doing?"
For Murphy's remarks and full coverage, click here.
What we know about the victims
A fourth-grade teacher and a 10-year-old boy were among those killed, ABC News has learned.
The teacher, Eva Mireles, had worked in the school district for approximately 17 years, her aunt, Lydia Martinez Delgado, confirmed to ABC News.
Fourth-grader Xavier Lopez was among the 19 children killed.
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What we know about the shooting so far
At least 21 people are dead after a gunman opened fire in Uvalde on Tuesday, authorities said.
Most of the victims were children in their last week of school before the summer break. Many other students and adults were injured in the mass shooting.
Here's what we know about what unfolded so far.
Several 911 calls were made from inside classroom as police waited outside
Those inside a classroom with the shooter made several calls to 911, but the tactical unit that arrived at 12:15 p.m. waited 35 minutes before breaching the classroom, Steven McCraw, director of Texas Department of Public Safety, said at a press conference Friday.
A 911 call was made at 12:03 p.m. from room 112 and lasted 23 seconds. McCraw did not identify the caller.
She called back at 12:10 p.m. and advised that there were multiple dead in the classroom, McCraw said.
The person then called again at 12:13 p.m. and again at 12:16 p.m., when said there were eight to nine students who were still alive, McCraw said.
A call was made by someone else from room 111 at 12:19 p.m., the caller hung up when another student told her to hang up, McCraw said.
At 12:21 p.m., three shots were heard over a 911 call. At 12:36 p.m., another 911 call was made by the initial caller and it lasted for 21 seconds. The student caller was told to stay on the line and be very quiet. She told 911 that the gunman shot the door, McCraw said.
At approximately 12:43 p.m. and 12:47 p.m., she asked 911 to please send the police now, McCraw said.
The caller said she could hear police next door at 12:46 p.m. At 12:50 p.m., the Border Patrol tactical unit finally breached the door and shot the suspect.