According to text messages obtained by The New York Times, the teenager who killed at least 21 people at a Texas elementary school told a teenage girl he shot his grandmother and ordered the bullets from the internet.

The shooting suspect said in a text message to a friend in Germany that he had just shot his grandma.

At least 19 young children and two teachers were killed by the suspect at Robb Elementary School in Uvalde, Texas.

A Yubo spokesman told Insider that the company was deeply sad and cooperating with law enforcement.

The spokesman for Yubo said that they are fully cooperating with law enforcement on their investigation.

Law enforcement shared the text messages after the shooting. According to The Times, the recipient, identified only by her nickname, "Cece," only understood the gravity of the messages after seeing the shooting on the news, at which point she asked a friend to contact US authorities.

The shooting suspect told her that on his birthday he had purchased an assault rifle and that he had recently purchased more than one round of bullets that would expand on impact.