Police say Mahsa Amini, 22, died of heart attack after arrest last week for alleged fault with hijab; activists claim she was killed by blow to head

Islamic Republic faces increasing levels of drought contributing to a lack of drinking water and sparking fears of future environmental crises

Iran remains hit by biting sanctions that keep it isolated from global financial systems; rising prices have driven protests in several Iranian cities in recent months

Activists say tech giant has taken down posts uploaded by demonstrators to its platforms, which they say impedes Iranians' ability to share information with the outside world

Still unclear how many remain unaccounted for in building that crumbled two weeks ago in southwest of country

Ayatollah Yousef Tababaeinejad appears unharmed in interview after incident; latest attack on cleric comes amid anger over economic woes

Angry crowd chants 'Our enemy is here; they lie that it is America'; authorities fire shots in the air, tear gas at protesters

State television report identifies detainees as Cecile Kohler, 37, and Chuck Paris, 69; the pair are accused of creating 'unrest' in Iran

Iranian MP says man was killed during recent protests in Khuzestan province, without giving details; 20 demonstrators said arrested

Dissident video played on network just ahead of commemoration ceremonies for 1979 Islamic Revolution