PORTLAND, Ore. — Portland State University said campus is back open Friday and all buildings are card access only.
Thursday evening, a group of pro-Palestinian protesters reentered the university's library, eventually prompting police to return and re-clear the building.
Officers had arrested at least seven more people as of 7:30 p.m. Thursday. Portland State University's Campus Safety also arrested one person, Portland police said.
"We can now confirm that trespassers did pull down the fence and broke back into the library. Police officers moved back into the library and made arrests. Arrests have also been made for people refusing to leave the park block at the library," Portland police said on Twitter.
So far, 30 people have been arrested relating to the pro-Palestine protests on the Portland State University campus, the Portland Police Bureau said Thursday afternoon.
At least seven of those arrests were PSU students, according to Portland police. Police are also searching for 18 people who fled from the library while officers cleared the building Thursday morning.
Students and other protesters remained on the blocks following a Thursday morning police operation to clear the PSU library of pro-Palestinian protesters, with the crowd gathered near the police perimeter around the library building.
PPB said that officers encountered "limited resistance" inside, but they had to work their way through barricades and found the floors slippery with paint and soap. One person sprayed a fire extinguisher at an officer, police said, but they were arrested along with two others.
Of the occupiers who fled the building, many carried improvised shields. One person "attempted to strike an officer with a shield" and was arrested by police.
When police went to put the arrested demonstrators into a van, protesters moved to stop them. PPB asked for the Oregon State Police Mobile Response Team to move in and push the crowd back so that the van could leave, but police said that some protesters followed the van out to I-405, with a few even moving onto the freeway, leading to "additional arrests."
RELATED: 12 arrested, including 4 students, as Portland police clear Portland State University library
After the library had been cleared Thursday morning, police reported members of the crowd outside were throwing water bottles at officers. Though for the most part, throughout the day the crowd was chanting and demonstrating peacefully outside the library.
Police used pepper spray at times and carried less-lethal munition launchers, but PPB said that those weren't used.
The situation appeared to escalate starting at around 3 p.m. Portland police said that officers had been hit with water bottles thrown from the crowd again, at which point police deployed a sound truck to the scene and were instructing the crowd to move off the South Park Blocks and Southwest Hall Street area.
Around the same time, a driver reportedly approached the crowd and sprayed some kind of pepper spray before abandoning the vehicle to flee. Portland police later located the man and said he was transported to a local hospital on a police mental health hold, PPB said Thursday evening.
Around 3:30 p.m., Portland police ordered protesters to leave the South Park Blocks on the Portland State University campus and declared the area closed. However, several protestors later reentered the library, Portland State University said, which resulted in police returning.
According to PPB, seven officers were injured throughout the day. Only one officer needed to be taken to the hospital with a knee injury.