Bangladesh, Feb. 22 -- Students from several Iranian universities have staged anti-government demonstrations-the largest since last month's deadly security crackdown.

The BBC has verified footage showing protesters marching across the campus of Sharif University of Technology in Tehran on Saturday. Clashes were later reported between demonstrators and pro-government supporters.

Other demonstrations included a sit-in at Shahid Beheshti University in the capital and a rally in the northeast city of Mashhad. Students were commemorating those killed in mass protests in January.

Meanwhile, the US has been increasing its military presence near Iran, and President Donald Trump has indicated that a limited military strike is under consideratio...