Timeline of how Texas school shooting unfolded

Massacre in Uvalde began on Tuesday 24 May with a single shot

The mass shooting at Robb elementary school in the small city of Uvalde, south Texas, began on Tuesday 24 May with a single shot.

An 18-year-old local man, who just a few weeks before had reached the age where he could legally buy a military-style assault rifle, sent ominous social media messages pre-dawn, including telling someone he was going to shoot his grandmother.