Washington Post foreign editor Douglas Jehl said he'd received "credible reports" that Jason Rezaian, the newspaper's correspondent in Tehran, and his wife Yaganeh Salehi were detained Tuesday night along with two other people.
Rezaian is an American citizen who has worked for various news outlets from Tehran since 2008. Salehi, a reporter for a United Arab Emirates-based newspaper, is an Iranian citizen who has applied for permanent residency in the U.S.
The other two American citizens detained with them who have not yet been identified are photojournalists, according to the Post.
The State Department said it was aware of reports that three American citizens had been detained in Tehran this week but said it had no further information to disclose.