Palestinian police in the designated area patrol in plain clothes and unarmed, but are not allowed to use force to restrain the settlers if they seek to impose themselves on the Palestinian villagers either by attacking them or by damaging their property.

ECONOMIST: The West Bank

Plain-clothes police lurk everywhere in Lhasa and the towns.

CNN: From Our Correspondent: Far Braver Than I

One group recently attacked several stallholders at an open-air market in Rafina, a port near Athens, after posing as plain-clothes police checking their permits.

ECONOMIST: Greek politics