From the Harvard Crimson:
POLICE RAID SIT-IN AT DAWN
250 ARRESTED, DOZENS INJURED
More than 400 policemen charged University Hall early this morning and forcibly — and sometimes violently — removed several hundred students who were occupying the building.
… President Pusey said this morning that … "It became clear … that the only possible alternative [to calling in police] was to take no action at all,…"
… Starting at about 5:05, about 75 State Police entered University Hall, and began dragging demonstrators out of the building. The people inside University Hall first heard rumors about the bust at 3:40 a.m. For the next hour, people woke up and milled around the first floor, where they had earlier agreed to make their stand against the police. They sang radical songs, received wet pieces of linen and instructions for there use against tear gas, and the phone numbers of lawyers who had agreed to defend those arrested.
At 4:58 a student rushed in and screamed the "Cops are coming." A moment later the shining blue helmets of the Massachusetts State Police could be seen through the windows. The demonstrators linked arms and started to chant, "Smash ROTC, no expansion."
…The troopers herded the people out of the anteroom, jabbing some in the back with clubs, shouting "Faster, faster." Several were pushed part-way down the stairs, and the group was taken to paddy wagons.
…The crowd of about 500 students in the Yard chanted, "Pusey Must Go," "Strike, Strike," and "Close the Place Down."
By 5:15, police had started to load students from inside the building onto buses and paddy wagons. Some resisted and were dragged and shoved into the buses. Within ten minutes, the buses had been filled with about 300 to 400 students, and they left for Middlesex County Third District Court, where the students were booked on charges of criminal trespassing.
Police slowly cleared students from the rest of the yard. At 6 a.m., the State Police marched back to their buses and left.
…Over 700 students gathered on and in front of the steps of Widener Hall between 6 a.m. and 6:15 to discuss a possible student strike.
Harvard Crimson, April 10, 1969.