Students at Harvard Law School boycotted classes Thursday and occupied the school's administrative building as part of a nationwide strike to call for more women and minority faculty members.

"It is time for this school to open its doors," said Vilia Drazdys of the student group Harvard Law School Coalition for Civil Rights.Students at more than 30 law schools across the country held strikes to call for greater diversity among faculty members.

A Harvard student spokeswoman said late Thursday about 50 students were holed up in Griswold Hall, the administrative building, and planned to remain at least until it reopened Friday. She said more students plannned to join the sit-in in the morning.

Campus police declined to comment on the occupation, but made no immediate attempt to evict the students.

"I can't predict what will happen (in the morning), whether the university will try to clear the students out," said Laura Hankins, 24, a second-year law student.