There has been a big increase in the number of migrants living rough in Paris, possibly linked to the closure of Calais's so-called "Jungle" camp, officials and social workers say, reports the BBC.
Numbers are reported to have risen from 1,500 to 2,500 in a week in the north-east of the capital, an area where there are regular illegal encampments.
Hundreds of tents have been pitched by migrants - mostly from Africa.
But officials stress the rise does not represent a huge explosion in numbers.
BBC Paris correspondent Hugh Schofield says that tents and makeshift shelters have become a familiar sight near the Stalingrad and Jean Jaures metro stations.
In the the last few days, the numbers of people living on the streets here has gone up by several hundred, our correspondent says.
Officials say it is likely that many of the migrants are from Calais, but they are not the people who have been taken on buses to centres around the country in the last few days;.
They are more likely to be migrants who left the Jungle two or three weeks ago when it became clear that the Calais camp was going to be cleared.
Some will presumably be biding their time in the capital to see whether the Calais route to the UK might become feasible once again, our correspondents says.