(Reuters) - Imprisoned Iranian lawyer Nasrin Sotoudeh, who has defended human rights activists including Nobel Peace laureate Shirin Ebadi, has been released by the authorities, her husband wrote in a Facebook post on Wednesday.

Sotoudeh, herself a human rights activist, had been serving a six-year sentence after being arrested in September 2010 and convicted of spreading propaganda and conspiring to harm state security.

Her husband Reza Khandan, whose Facebook page is followed by thousands, wrote in a short post on Wednesday: "Nasrin came ... they told her you are free ..."

Khandan did not immediately respond to a request for comment, and no further details were available on the conditions of Sotoudeh's release.