He was speaking two days after President Francois Hollande said that the camp, which sprang up in September, would be cleared: "We will do the same operation as in Calais and take them to centres", he said.
There are now hundreds of tents pitched along Paris streets after the camp near the French and United Kingdom border was removed last week, where children and adults are sleeping.
Bulldozers are flattening the sprawl of ramshackle huts and tents in northern France which had been home to 6,000 refugees and migrants from Asia, the Middle East and Africa hoping to cross the English Channel and start new lives in Britain. Hundreds were reported missing from the camp as evacuation loomed.
Most migrants recently amassing around the station are part of a "new migratory current coming from Libya these last weeks and months", Hollande said.
A migrants carries a mattress in a makeshift camp in Paris, on Friday. Paris regional authorities say 19,000 migrants have been shifted to temporary housing since June 2015.
French officials say the number of refugees sleeping on the streets of Paris has risen by at least a third since the camp in Calais known as the "Jungle", was demolished earlier this week.
Following the evacuation of the "Jungle" in Calais, the camp at Stalingrad is now the largest in France, with some 2,000 people in makeshift accommodation there.
Hollande met with migrants Saturday brought from Calais to a reception center in Doue-la-Fontaine in western France.
Numerous children have family members living in the United Kingdom, it points out, so the letter said they "are not asking any favours; they have the right, in line with current global regulations and British law, to go to Britain". He said he spoke Friday to British Prime Minister Theresa May about the issue.
Britain has already taken more than 300 children from the Jungle.
"It's not a huge explosion in numbers but there is a clear increase", she said.
Anti-immigrant sentiment in Britain and France has complicated efforts to address the long-running Calais migrant drama.