Iranian government imposes Internet blackout to curb protests

While observers do not believe the unrest, now in its fourth week, is close to toppling the government, the protests mark one of the boldest challenges to the Islamic Republic since the 1979 revolution, with reports of strikes spreading to the vital energy sector. The authorities are waging a deadly crackdown. Videos on social media showed trucks moving dark green tanks to Kurdish areas, raising the stakes in the revolt. Reuters could not verify the video footage.