College swimming champion Riley Gaines slammed San Francisco State University for praising their students for so-called 'peaceful' protests after she claims she was hit 'multiple times by a guy in a dress' following a speech about saving women's sports.

Gaines, 23, was forced to barricade herself inside a room for around three hours at the San Francisco State University campus on Thursday night after a group of activists ambushed her. 

She was giving a speech to students about competing against Lia Thomas, a transgender woman, at the Women's NCAA Swimming Championships last year. It's unclear what exactly set off the fracas but video shows students loudly drowning out Gaines' speech about competing against 'biological males' in women's sports.

In an email to students from Jamillah Moore, Vice President for Student Affairs & Enrollment Management and reposted online, she claims the school is 'proud' of the students who 'participated peacefully' and made it clear that the trans community is welcome at the school.

Gaines - who told DailyMail.com exclusively about how she was punched twice by a trans activist - responded angrily, writing: 'I'm sorry did this just say PEACEFUL.... I was assaulted. I was extorted and held for ransom. The protestors demanded I pay them if I wanted to make it home safely.'