Iraqi cleric Moqtada al-Sadr Friday warned against attempts to block "peaceful protests," after security forces used tear gas and sound bombs to clear a demonstration by his supporters.

Sadr announced in a statement that "peaceful protests" would continue, and warned that "no side has the right to prevent that. Otherwise, the revolution will take another form."

Protesters loyal to Sadr broke into Baghdad's fortified Green Zone for a second time in three weeks on Friday and entered the premier's office, but were later dispersed by security forces.