3 billboards grill Marco Rubio outside of Miami office

Three billboards outside of Sen. Marco Rubio’s Miami offices are causing a stir.

“Slaughtered in school,” “And still no gun control?” “How come, Marco Rubio?” an activist group’s message reads.

The campaign was inspired by the Oscar-nominated film “Three Billboards Outside of Ebbing, Missouri,” in which a mother, played by Frances McDormand, desperately seeks answers in the case of her daughter’s rape and murder.

She erects three red billboards that call on the town’s sheriff to deliver them. “Raped while dying,” “And still no arrests?” “How come, Chief Willoughby?” the billboards in the movie read.

Activist group Avaaz coordinated the mobile signs that went up Friday and will move around Miami through Monday.

They were devised after gunman Nikolas Cruz opened fire on his former high school in Parkland, Fla., killing 17 people.

“I had seen the movie the night before the shooting, and it’s about heart and humanity, and one human being trying to get the attention of another,” Avaaz president Emma Ruby-Sachs told the Daily News Saturday.

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“We just copied the design from the movie and that was our inspiration,” she said, adding that she wanted to mimic to simplicity of the made-up signs.

“It’s about the fact that school is not a place where you should die,” she said.

Ruby-Sachs added that it was important that the group deliver its message right away.

“You have a brief moment to capture the attention of these lawmakers when all the other pressures they are facing aren’t front of mind,” she said.

Sen. Marco Rubio received $3.3 million in campaign contributions from the National Rifle Association, and holds an A+ rating from the organization.

He said after the shooting that stricter gun laws would not have prevented the massacre at Marjory Stoneman Douglas High School on Feb. 14.

“That is a fact,” he told WPBF-TV.

Ruby-Sachs hopes her group’s message will get through to the conservative senator.

“It seeks like a lot of people are speaking out right now in a different kind of tone and maybe this one will go through,” she said.

The group’s goal is “any kind of gun control,” Ruby-Sachs said. “Even just the banning of AR-15s.”

The group has not yet been contacted by Sen. Rubio’s office.

“That’s okay. I think this is a really wide conversation and this was an attempt by a group of people to speak out to another group in a human way,” she said.

In the meantime, she’s hoping for change.

“Something has to cut through what these lawmakers are saying because I know for a fact that nobody wants to look at what happened in Florida and sit tight and do nothing,” she said.