Tahrir protesters under attack by tear gas canisters, fired by CSF troops advancing in Muhammad Mahmoud Street on Saturday.
A young man picks up the tear gas canister to throw it back at the police.
CSF troops advancing on Tahrir from Qasr el-Aini Street fire more rounds of tear gas at demonstrators in Tahrir.
Protesters, on Saturday afternoon, pile rocks at the entrance of Muhammad Mahmoud Street to defend Tahrir Square against attacks by the police.
Chants against SCAF and the police echo, as protesters armed with rocks force CSF troops to retreat.
Protesters march back to the square after forcing CSF troops to retreat. The street continues as of time of writing to be the scene of ongoing clashes.
Police troops shower protesters with rounds of US-made tear gas on Saturday.
Protesters escorting an injured colleague amid police crackdown.