The Texas gunman who killed 19 students and two teachers sent Facebook messages he was “going to shoot an elementary school” 15 minutes before his deadly attack.

       Suspect Salvador Ramos, 18, also had no previous criminal record or known mental health history before attacking Robb Elementary School in Uvalde, Texas, on Tuesday, according to officials.

       Now a 15-year-old girl from Germany has told The New York Times that Ramos had text messaged her just before the shooting, saying “Ima go shoot up a elementary school rn.”

       The teenager, who is only referred to as Cece, told the newspaper that she received the message immediately after another one at 11.21am, in which the suspect texted her “I just shot my grandma in her head.”

       She said that she met Ramos several weeks ago on the livestreaming app Yubo, and that he videomessaged her from a gun shop earlier in the month where he said he was buying an AR-15 rifle.

       Cece says that she did not raise the alarm but when news of the massacre broke got a friend in the US to contact authorities on her behalf.

       Earlier, Texas governor Greg Abbott told a Wednesday press conference that Ramos had posted on the social media platform three times in the 30 minutes directly before the attack.

       The first was, “I’m going to shoot my grandmother.” The second message was, “I shot my grandmother.” And the third, which took place just before that attack stated, “I’m going to shoot an elementary school.”

       Officials pointed out that Ramos did not specify which elementary school he intended to attack in the city of 16,000 people that sits 80 miles west of San Antonio.

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       Meanwhile, Andy Stone, a spokesman for Facebook’s owner Meta, clarified the governor’s statement, saying that the suspect sent private messages and had never publicly posted any threats.

       “The messages Gov. Abbott described were private one-to-one text messages that were discovered after the terrible tragedy occurred. We are closely cooperating with law enforcement in their ongoing investigation,” he stated on Facebook.

       The shooting is the deadliest since the attack at Sandy Hook Elementary School in Connecticut in 2012, where 20 children and six staff were killed.

       It also took place less than two weeks after 10 people were shot and killed at a Buffalo supermarket in a racially-motivated attack.

       “Evil swept across Uvalde yesterday. Anyone who shoots his grandmother in the face has to have evil in his heart,” said Mr Abbott.

       “But it is far more evil for someone to gun down little kids. It is intolerable and it is unacceptable for us to have in the state anybody who would kill little kids in our schools.”

       Police say that Ramos had bought two AR-15 style assault weapons for his 18th birthday from a local store. The ATF says Ramos legally bought two riles on 17 May and 20 May. One of the rifles was left in the suspect’s crashed truck, while the other, a Daniel Defense, was found with him in the school.

       He bought 375 rounds of 5.56 ammunition on 18 May.

       Ramos’ grandfather Rolando Reyes said the family did not know he had high-powered assault rifles at home.

       “I didn’t know he had weapons,” Rolando Reyes told ABC News. “If I’d have known, I would have reported it.”

       Authorities have identified two teachers: Eva Mireles, 44, and Irma Garcia, 46, among the dead.

       Amerie Jo Garza, Makenna Lee Elrod, Xavier Javier Lopez, Jose Flores, Navaeh Brown, Annabell Guadalupe Rodriguez and Ellie Lugo, all aged 10 are among the children who have also been identified.