NEW : President says on social media that curfews are in hands of local governments . In Port Said , about 4,000 people join protest , chanting anti-government slogans . U.N. office : Early reports suggest most casualties were caused by authorities . Comment:
NEW : President says on social media that curfews are in hands of local governments . In Port Said , about 4,000 people join protest , chanting anti-government slogans . U.N. office : Early reports suggest most casualties were caused by authorities . The defense minister denies claims that the army used live ammunition on protesters .