International calls were possible today from some mobile phones in Iran, where internet and international phone traffic were cut off following the suppression of protests across the country.
Several people in Tehran managed to call the Associated Press (AP) and speak to reporters, but the agency's Dubai office was unable to return their calls.
People the reporters spoke to said that sending text messages still appeared to be impossible.
Iranian authorities suspended the internet and phone calls on Thursday as protests intensified.
United States (US) President Donald Trump said Tehran wants to negotiate with Washington after his threat to attack Iran over its crackdown on protesters.
According to activists, at least 646 people were killed in the government's crackdown on protesters.
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