Daniel Maurer The Starbucks at Astor Place, hours
before the attack.

Last night’s riotous atmosphere resulted in a sergeant and lieutenant suffering minor injuries while scuffling with anarchist protesters at the Astor Place Starbucks, the police said.

According to police, around 25 people tried smashing the windows of the cafe with eight-foot long steel pipes at around 8:45 p.m. after attending the Anarchist book fair earlier in the day. “Patrons fearing that they would be hit by flying glass hid under tables,” the police said in a statement. “Several” officers were assaulted with pipes and bottles, the police added.

Eric Marchese, a 24-year-old from Brentwood, N.Y., and Nicholas Thommen, a 30-year-old from Salem, Oregon were arrested at the scene. The former was charged with criminal mischief and disorderly conduct, the latter faces a variety of charges, including inciting to riot, criminal possession of a weapon and assault.

According to police, part of the rowdy group — some of them masked — marched towards Tompkins Square Park, chanting “cops are murderers” and “all pigs must die.” The crowd eventually grew to around 150, with some tipping garbage cans and spray painting anarchist symbols on buildings, the police said.

Later, during an “after party” at the Sixth Street Community Center, the police were again assaulted while arresting Alexander Penley, a 41-year-old resident of the Upper West Side. He also was charged with several crimes, including inciting to riot, criminal possession of a weapon and assault. The party was over by 11 p.m. and there was no more trouble, according to the police.

Update | 9:59 p.m. Due to an inaccuracy in a bulletin released by the Police Department, an earlier version of this story reported that the protestors marched towards Washington Square Park. The protestors actually marched toward Tompkins Square Park. The Local regrets the error.