BOSTON — Chaos has returned to the so-called “safest city in America.” For the second time in mere days, Boston erupted into a violent street riot — this time leaving four police officers hospitalized and one with a shattered nose allegedly at the hands of a Tufts University student.

Roder Atwood, 21, of Somerville, was arrested Tuesday night after what began as a “pro-Palestine peace rally” on Boston Common devolved into yet another urban melee. Prosecutors say Atwood, a political science major at the elite university, punched an officer in the face so hard it broke his nose, sparking mayhem that spilled onto Tremont Street.

Police say demonstrators blocked traffic near the Park Street station, refused orders to clear the road, and surrounded cruisers — kicking and striking the doors as officers tried to reach a nearby medical emergency. By the end of the night, four cops were in the hospital, several with broken bones and back injuries from the chaos.

The violence came just days after another mob torched a Boston police cruiser in the South End — the latest sign that the city under Mayor Michelle Wu has lost control of its streets.

“This is what collapse looks like,” one longtime resident told Mass Daily News. “Two riots in a week, cops getting beaten, and politicians pretending it’s fine.”

Mayor Wu, under growing pressure, issued a carefully worded statement Wednesday claiming Boston “will not tolerate violence,” but her words rang hollow as footage of officers bloodied and overwhelmed flooded social media.

Atwood, who pleaded not guilty in Boston Municipal Court, was ordered held on $10,000 bail and banned from the Boston Common if released. Tufts University rushed to distance itself, calling the allegations “serious and concerning” and promising “accountability” if its student is found guilty.

Meanwhile, twelve others aged 19 to 28 were arrested for resisting arrest and disorderly conduct. Their bails? A mere $500 each.

As outrage builds, calls are growing for former President Donald Trump — and not the Governor — to send in the National Guard to restore order. “If Mayor Wu and Commissioner Cox can’t keep cops from getting their noses broken, it’s time for someone who can,” said one furious local.

Boston’s leadership insists the situation is “under control.” But after two riots in less than a week, broken bones, flaming cruisers, and shattered noses tell another story: the city is slipping — fast.