Protests by students demanding universities sever ties with Israel over the Gaza war spread across western Europe on Tuesday, sparking clashes and dozens of fresh arrests.

Students at various European universities, inspired by ongoing demonstrations at US campuses, have been occupying halls and facilities, demanding an end to partnerships with Israeli institutions because of Israel's punishing assault on Gaza.

Several hundred protesters resumed a demonstration around the University of Amsterdam campus, where police the previous night were filmed baton-charging them and smashing up their tents after they refused to leave the grounds.

As protests resumed on Tuesday night, demonstrators erected barriers to access routes watched over by a heavy police deployment.

Police said in a statement that a total of 169 people had been arrested when officers broke up Monday night's protests.

All had been released apart from two still in custody on suspicion of public disorder offences.

Violence had briefly erupted Monday when a small group of counter-protesters wielding flares stormed the main protest.

Around 50 demonstrators were also protesting Tuesday outside the library in Utrecht University and a few dozen at the Technical University of Delft, according to local news agency ANP.

In the eastern German city of Leipzig, the university said in a statement that 50 to 60 people occupied a lecture hall on Tuesday, waving banners that read: "University occupation against genocide".

Protesters barricaded the lecture hall doors from the inside and erected tents in the courtyard, according to the university.

The institution called in the police in the afternoon, and filed a criminal complaint.

Criminal proceedings have been initiated against 13 people who were in the lecture hall on suspicion of trespassing. No arrests have been made so far.

Earlier, at Berlin's Free University, police cleared a demonstration after up to 80 people erected a protest camp in a courtyard of the campus.

The protesters, some of whom wore the keffiyeh scarf that has long been a symbol of the Palestinian cause, sat in front of tents and waved banners.

They later tried to enter rooms and lecture halls and occupy them, according to the university, which said it then called in police to clear the protest.

The university said property was damaged while classes in some buildings were suspended for the day. Berlin police said they made some arrests for incitement to hatred and trespassing.

In Paris, police twice intervened at the prestigious Sciences Po university to disperse about 20 students who had barricaded themselves in the main hall.

Security forces moved in to allow other students to take their exams and made two arrests, according to Paris prosecutors.

The university said exams proceeded without incident.

At the nearby Sorbonne university building, police late Tuesday moved to eject about 100 students who had occupied an amphitheatre and made 88 arrests, police sources said.

In Switzerland, protests spread to three universities in Lausanne, Geneva and Zurich.

The University of Lausanne said in a statement it "considers that there is no reason to cease these relations" with Israeli universities as protesters demand.

In Austria, dozens of protesters have been camped on the campus of Vienna University, pitching tents and stringing up banners since late Thursday. (AFP)