Three crimes against migrant workers in a few days in the same Cambridgeshire town are being investigated by police.
Two Eastern European men were attacked by a gang of four teenagers armed with a golf club and a table leg in Oak Drive, Huntingdon, on 30 September.
The next day a stone was thrown through the window of a house in Beech Close as a gang of about 15 youths shouted racist abuse at the occupants.
And a 31-year-old man was attacked by seven youths in Oak Drive on 2 October.
The victim was hit over the head with a table leg.
Insp Andrew Pickles said: "It is totally unacceptable and unlawful that members of our community are being targeted because of their nationality.
"Cambridgeshire Constabulary treats crimes of this nature very seriously and I would like to appeal for anyone with information to come forward."