Around two hundred migrants have fought running battles against one another in Calais, with Africans pitched against Afghans, reports The Telegraph.
More than a hundred French riot police were sent in to stop the violence, which left seven men slightly injured after the migrants attacked each other with sticks and stones.
Last summer, police used tear gas to end fights among hundreds of migrants who were attempting to storm lorries bound for Britain.
The latest incidents, which lasted until around 3am on Satruday, took place in the sand dunes near the port where hundreds of migrants live in squalid camps or derelict buildings.
"It was a big fight involving 200 migrants. We have had ones of this size before," said Nicolas Honoré, a Calais police official.
The battles started on Friday evening, after authorities in the port closed down a shelter that had been opened on Boxing Day to house up to 200 migrants.
The town hall said it would no longer offer overnight accommodation in the industrial hangar equipped with mattresses “having taken account of the rise in temperatures”.