UVALDE, Texas (AP) — Students trapped inside a classroom with a gunman repeatedly called 911 during this week's attack on a Texas elementary school, including one who pleaded, "Please send the police now," as officers waited more than an hour to breach the classroom after following the gunman into the building, authorities said Friday.

The commander at the scene in Uvalde — the school district's police chief — believed that 18-year-old gunman Salvador Ramos was barricaded inside adjoining classrooms at Robb Elementary School and that children were no longer at risk, Steven McCraw, the head of...