From the New York Times:
After the visas of most visiting journalists expire [including, today, NPR’s correspondent and the Times’s Bill Keller], some will be able to remain. The BBC’s permanent correspondent in Tehran, Jon Leyne, recently had his residency extended by the government…
NBC and The New York Times, among other outlets, also employ Iranian residents.
Similarly, The Associated Press has a large year-round presence in Tehran, including a number of Iranians. While visas for three of the wire service’s journalists are expiring, the operation will still have local employees in the capital city.