Updated

A social media editor in Bahrain says the tiny Gulf country's most prominent blogger and vocal supporter of Shiite-led anti-government protests has been detained.

Amira al-Husseini, a Middle East and North Africa editor at Global Voices Online says police took the 50-year-old blogger, Mahmoud al-Youssef, into custody early Wednesday from his home in Duraz, an opposition stronghold northwest of the capital Manama.

Al-Youssef's brother, Jamal, confirmed the arrest.

Bahrain's Sunni rulers declared emergency rule and invited Saudi-led troops to help quell a month of Shiite-led protests demanding greater political freedom in the Gulf kingdom.

Hundreds of opposition activists have been detained since martial-type laws were introduced two weeks ago.