Police have arrested hundreds more protesters in locations across the US, as protests against the war in Gaza intensify across university campuses.
Some 108 arrests were made at Emerson College, Boston police told the BBC's US partner CBS News.
Earlier, 93 people at the University of Southern California (USC) in Los Angeles were taken into custody on trespassing charges.
Protesters and police also clashed at the University of Texas in Austin.
Authorities said 34 people were arrested there too. Universities across the US have seen a growing number of students walk out of class or try to set up encampments to protest against Israel's military campaign in Gaza.
The latest arrests follow others at Columbia, Yale and New York University. The arrests at USC were made as students gathered in Alumni Park - where the university's main-stage graduation ceremony is scheduled to take place next month.
Police officers in riot gear cleared a pro-Palestinian encampment at the centre of the campus, preventing demonstrators from gathering. Students received a 10-minute warning from police helicopters to disperse. Those who refused, were arrested on trespassing charges.
The protest was reported to have been largely peaceful at first, but then turned tense with the continued police presence.
As police tried to detain one woman, protesters threw water bottles at them and chanted, "Let her go!"
Protesters gathered around the officers, drowning out their warnings with "free Palestine" chants. Students, some wearing kaffiyehs were holding "liberated zone" signs, banging drums.
Elsewhere in the country, Boston police told CBS that three officers had been injured in the action in that city - one of them seriously, though their condition was not life-threatening. No protesters were hurt, police added.
Students are said to have been camping out since Sunday, allegedly ignoring warnings to leave.
Emerson College has not yet commented on the arrests. In a previous statement, it said it supported the right to peaceful protests - while urging activists to comply with the law. BBC