BEIRUT (Reuters) - Syrian security forces and students with knives attacked a protest at the University of Aleppo early on Thursday, killing at least four people and arresting 200, according to activists and videos uploaded on the Internet.

Security forces raided the campus and fired at hundreds of students marching in support of the Arab state's 14-month-old revolt against President Bashar al-Assad in the northern city, the Syrian Observatory for Human Rights said.

(Reporting by Erika Solomon; Editing by Alistair Lyon)