US President Donald Trump has said arming teachers could prevent school shootings like that which left 17 people dead last week in Florida.

A staff member with a gun could end an attack “very quickly”, he said.

Mr Trump floated the proposal – long-championed by the powerful NRA gun lobby – as emotional survivors of the 14 February massacre urged him to take measures to stop similar attacks.

The US leader called for improved background checks on gun buyers.

“It’s not going to be talk like it’s been in the past,” he said.