Limited internet briefly returns in Iran after protest blackout

Iran's president warned that an attack on the country's supreme leader would be a declaration of war -- an apparent response to U.S. counterpart Donald Trump saying it was time to look for new leadership in Iran. The rallies subsided after the crackdown that rights groups have called a "massacre" carried out by security forces under the cover of a communications blackout that started on January 8. Khamenei said authorities "must break the back of the seditionists", as local media have reported thousands of arrests and rights groups have estimated up to 20,000 people have been detained.