Five people have been shot in violent clashes between groups of migrants in Calais.
Migrants carrying sticks march in the streets of Calais. Credit: PA
Police reinforcements have been sent to the French port city amid warnings of growing tensions in the area.
Twenty two people were injured in the fighting which the French interior minister Gerard Collomb blamed on "organised" gangs.
Authorities said Afghan and Eritrean migrants had been fighting with sticks and stones after a meal distribution before the shots were fired. Firearms are rare among migrants.
Police have made no arrests.
More than 1,000 children and adults sleep rough in the channel ports of Calais and Dunkirk, a decline from the days when 7,000 lived in the now-demolished Jungle camp, which was closed in 2016.
Migrants continue to converge on Calais in the hopes of crossing the Channel to Britain.
Last month, during French president Emmanuel Macron's visit to the UK, Britain agreed to the signing of a new treaty designed to improve security in Calais.