The kalame website, which supports opposition leader Mir Hossein Musavi, reports that the filtering stopped around 10 p.m. local time.
Users of the popular Balatarin website posted screen grabs of Google with the message “Access to the website is not possible” in red.
Google had reportedly been blocked temporarily in Iran on at least one other occasion due to what had been described as a filtering “error.”
Iran’s Internet policy is among the most restrictive in the world. The hardline rajanews website recently reported that some hard-line blogs have been also filtered.
-- Golnaz Esfandiari