British police will enforce a 30-day ban on protest marches in five London boroughs starting Friday.

The Metropolitan Police Service got permission from Britain's Home Secretary to impose the ban in Newham, Tower Hamlets, Waltham Forest, Islington and Hackney.

Those areas were at the center of last month's violent riots and heavy fighting with police.

Police say they pursued the ban after getting specific information on possible violence and unrest.

The far right English Defense League says it will defy the ban and stage a protest march Saturday. Police officials say they will deploy more than 3,000 officers during the march to deter violence.