US campaigners have taken inspiration from the 2017 film Three Billboards Outside Ebbing, Missouri to call for gun control in the wake of the which claimed 17 lives.

The placards were driven around Miami on Friday local time to put pressure on its Republican senator after the high school massacre this week in Florida.

The signs, reading "Slaughtered in school", "And still no gun control?", "How come, Marco Rubio?", echoed the Oscar-nominated film where a mother challenges authorities over justice for her daughter who was raped and murdered.

The protest was organised by activist group Avaaz, which highlighted the campaign donations Rubio has accepted from gun advocates the National Rifle Association (NRA).

"The senator has taken fire across the country for his toothless response to the shooting, calling it 'inexplicable'. We call that inexcusable," Emma Ruby-Sachs, Avaaz's deputy director, said.

PAA RTV