Games were preceded by moments of silence and Major League Baseball issued a statement on Tuesday after at least 19 children and two adults were killed in a mass shooting at an elementary school in Uvalde, Texas.

“Our hearts are broken tonight,” the MLB statement read. “Major League Baseball mourns with the families and friends of the victims of today’s senseless tragedy and for all the people of Uvalde, Texas.”

An 18-year-old gunman was responsible for the deadliest shooting at a U.S. grade school since a gunman killed 20 children and six adults at Sandy Hook Elementary in Newtown, Conn., in 2012. The Uvalde shooting came just 10 days after a gunman killed 10 Black shoppers and workers in a racist attack on a supermarket in Buffalo, N.Y.

At Houston’s Minute Maid Park, roughly 300 miles east of Uvalde, the Astros and visiting Guardians held a moment of silence before their game.

The Rangers shared a similar sentiment through the Texas Rangers Foundation’s Twitter account, and a moment of silence was held before their game against the Angels in Anaheim.

The Nationals, Twins and Pirates were among the teams who held moments of silence in their home parks prior to Tuesday’s games.