Official returns show that Iran's president, Mahmoud Ahmadinejad, won re-election by a landslide. The tally has the incumbent with nearly twice as many votes as his reformist challenger, Mir Hossein Mousavi.

Mousavi challenged the results, calling them a "charade," and his supporters accused the government of shutting down cell-phone, text-messaging and Internet systems to silence them. Protesters clashed with riot police in Tehran in sporadic battles Saturday after the results of Friday's voting were announced.

Guy Raz gets the latest from NPR's Mike Shuster, who is in Tehran.

Copyright 2023 NPR. To see more, visit https://www.npr.org.