MELISSA BLOCK, Host: This is ALL THINGS CONSIDERED from NPR News. I'm Melissa Block.</s>MICHELE NORRIS, Host: To Iran now. Today, anti-government protestors clashed with police in the capital, Tehran.</s>MELISSA BLOCK, Host: And, Thomas, tell us how big were these protests today? And how did the Iranian government respond?</s>MELISSA BLOCK, Host: And the security forces had trouble containing them, the witnesses told me. And they also described several clashes in which the security forces used tear gas and batons to try and discourage the protestors.</s>MELISSA BLOCK, Host: And were there reports of casualties?</s>MELISSA BLOCK, Host: I have not heard reports of casualties. Again, it's very difficult for me to oversee what has happened, and on how many locations the protests have taken place. But what I have heard is several arrests have taken place in several parts of the city. And I can fairly say that it runs into the dozens of people that have been arrested today.</s>MELISSA BLOCK, Host: What is the Iranian opposition saying, first?</s>MELISSA BLOCK, Host: So both men, both Mousavi and Karroubi and their wives have, it seems, gone missing.</s>MELISSA BLOCK, Host: Has the opposition called for ongoing protests in Tehran?</s>MELISSA BLOCK, Host: So it is unclear who is leading this. And I think this also makes it problematic for the demonstrators because when do you go out and when do you stay at home?</s>MELISSA BLOCK, Host: I've been talking with Thomas Erdbrink from Tehran. He's a correspondent there for The Washington Post. Thomas, thanks very much.</s>MELISSA BLOCK, Host: Thank you.
Host Melissa Block speaks with Thomas Erdbrink, correspondent for the Washington Post, about arrests of Iranian opposition leaders Mir Hossein Mousavi and Mehdi Karroubi — which spurred protests today in Tehran.