Videos have continued to come streaming into YouTube throughout the day, and we've been updating this playlist with new videos as they've been posted.
This wobbly footage appears to show a clash between riot police and citizens - and shots can be heard in the background:
This video, which we found via the New York Times' Lede blog, shows students protesting at Polytechnic University pulling down a gate that's holding them in:
High school students are also participating in the protests:
This video from earlier in the day shows protesters and the Basiji facing off on either side of a fence:
This video indicates that protests have continued into the night in Tehran: