Demolition teams are due to return to the French port of Calais to dismantle more makeshift shelters in the migrant camp known as the "Jungle", the media reported on Tuesday.
On Monday night, riot police fired tear gas at migrants who were hurling stones at the demolition squads, BBC reported.
About 100 shacks were dismantled and 12 shelters were set ablaze.
More trouble broke out later as about 150 migrants, some wielding sticks and iron bars, fanned out across scrubland towards the motorway heading to the port.
Authorities said the migrants mainly from the Middle East, Afghanistan and Africa, must move to shipping containers on another part of the site.
But many fear this will require them to claim asylum in France, and give up their hopes of travelling to Britain.
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At least four people, including activists from the Britain-based No Borders group, were arrested during Monday's unrest, police said.
The number of migrants presently living at the "Jungle" is over 5,000.