Officials say the 19 children and two teachers killed in a school shooting in Texas in the United States yesterday were barricaded in a single classroom by the gunman.
Two teachers also died in the attack at Robb Elementary school in the town of Uvalde.
More than one dozen others were injured.
US President Joe Biden has issued an emotional appeal for backbone and courage to confront America's gun lobby.
The gunman, 18-year-old Salvador Ramos, was shot dead by police at the scene.
Our correspondent Simon Marks joins us now from Washington DC.
