WASHINGTON — From Washington to Los Angeles, students walked out of US classrooms Wednesday in the largest grassroots protest against gun violence seen in years, demanding action one month to the day after a deadly shooting rampage at a Florida high school.

Hundreds of teenagers from Washington area schools gathered outside the White House, holding up signs reading "Books Not Bullets" and "Protect People Not Guns" before marching on the US Capitol.

"We want to show Congress and politicians we are not standing by, we are not silent anymore," said 17-year-old Brenna Levitan, who was at the protest with her mother. "Parkland is going to be the last school shooting."

Students in dozens of other cities in all 50 states staged similar demonstrations and observed a moment of silence to honor the 14 students and three adult staff killed a month ago at Marjory Stoneman Douglas High School in Parkland, Florida.

In Washington, several hours after the protests broke up, US lawmakers took their first significant step to address school gun violence since the Parkland shooting.

The House of Representatives voted 407-10 to fund violence prevention measures at schools including boosting security, mental health screening and creating anonymous reporting systems so students can report threats.

But Congress has yet to tackle the more controversial aspects of gun control demanded in the wake of the Parkland shooting.

These include expanded background checks for gun sales, a ban on assault weapons and raising the minimum age for some firearms purchases.

’We want change’

Dressed in the school’s maroon colors, students at Stoneman Douglas visited memorials to their slain classmates and hugged and cried.

At a high school in Cherry Hill, New Jersey, students marched to the football field and assembled in a heart formation to pay tribute to the victims.

In Los Angeles and other cities, teenagers spelled out the protest slogan "#ENOUGH" by lying down on the ground on sports fields.

In Washington, students were joined by Democratic members of Congress at the Capitol.

Speakers denounced the National Rifle Association (NRA), the powerful US gun lobby, and demanded that Congress enact tougher laws on gun ownership. "You, the young people of this country, are leading the nation," Senator Bernie Sanders told the crowd. "People are sick and tired of gun violence and the time is now for all of us, together, to stand up to the NRA."

In New York, students -- many of whom wore orange, the color of gun control -- walked out from more than 50 schools. "We want change," and "Am I next?" they chanted.

Press secretary for New York Mayor Bill de Blasio, Eric Phillips, said "just over 100,000" students took part from the city’s schools.

The "National School Walkout" was intended to last for 17 minutes, one for each victim.

But tens of thousands of students around the country decided to skip school entirely and protest instead. — AFP