Moscow police have rounded up some 1,400 suspected illegal migrants in raids on marketplaces over recent days. The crackdown began after a police officer was seriously injured in a clash with migrant workers while trying to arrest a suspect at Matveyevsky Market on July 27. With detention facilities overflowing, city authorities have set up a tent camp in Moscow's eastern Golyanovo district, where hundreds of migrants are being held while awaiting deportation.