Iran Press/ Asia: Days of violence have been sparked by students' calls for the government to axe a rule reserving scores of public jobs for the families of veterans of the country's independence war in 1971.
The prime minister's office announced the curfew after an attack on the Narsingdi prison on Friday saw hundreds of inmates released.
Government Press Secretary Naeemul Islam Khan said the army would be deployed to the streets in a bid to restore order.
"The government has decided to impose a curfew and deploy the military in aid of the civilian authorities," he said in a statement.
Some 67 people have now died since violence broke out - although the exact toll is difficult to assess due in part to an almost complete communications shutdown, with mobile internet and telephone lines reportedly down.
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