Mia Tretta was shot in the abdomen in 2019 at a school near LA and Zoe Weissman witnessed a Florida shooting in 2018

• Full report: person of interest in custody

• What we know so far

As the deadly attack unfolded at Brown University, leaving students hiding under desks and reeling as gunshots rang out, the scene was eerily familiar for at least two students.

Years earlier, Mia Tretta, 21, and Zoe Weissman, 20, had both survived school shootings. “What I’ve been feeling most is just, like, how dare this country allow this to happen to someone like me twice?” Weissman told the New York Times.

Teenager who first scrawled messages on pavement in protest at rightwing government did not expect so many others to follow suit

Scrawled in chalk on the pavement near a secondary school in eastern Slovakia, the messages were short and to the point: “Enough Fico,” read one, echoing a popular anti-government slogan, while the other joked about the Slovakian prime minister providing sexual favours to Vladimir Putin.

Appearing hours before the prime minister, Robert Fico, was due to speak at the school, the messages struck a nerve. Similar comments swiftly began sprouting up across Slovakian pavements in what was labelled the “Chalk Revolution” by some and “November Chalk Wave” by others.

As 27 European countries urge changes to laws forged after second world war, human rights chief says politicians are playing into hands of populists

The battle had been brewing for months. But this week it came to a head in a flurry of meetings, calls and one heady statement. Twenty-seven European countries urged a rethink of the human rights laws forged after the second world war, describing them as an impediment when it came to addressing migration.

Amnesty International has called it “a moral retreat”. Europe’s most senior human rights official said the approach risked creating a “hierarchy of people” where some are seen as more deserving of protection than others.