Sanaa, Yemen (CNN) -- Men armed with knives attacked more than a thousand anti-government protesters gathered in the Yemeni capital to demand reform, human rights groups said.
The protesters took to the streets of Sanaa on Friday night to support the ouster of Egyptian President Hosni Mubarak.
Chanting crowds initially referred to the end of the 30-year regime of Mubarak, but later changed their focus to Yemen.
"Yesterday Tunisia, today Egypt, tomorrow Yemen will open the prison," some chanted, according to Human Rights Watch. CNN
