The Latest on Europe's migration crisis (all times local):

12:15 p.m.

About two dozen migrants protesting the demolition of a sprawling camp in northern France are occupying shanty rooftops, and are surrounded by police.

The slow tear-down of the encampment in Calais is continuing, angering migrants who live there in squalid conditions in hopes of reaching a better life in Britain.

In Tuesday's protest, a man and a woman on a rooftop warned police not to come closer. But police moved in, and the woman sliced her wrists. The man was beaten with batons and both were removed from the roof. The woman was conscious, but her condition wasn't immediately known.

French authorities are blaming the activist group No Borders for the ongoing unrest.

Calais is temporary home to an estimated 4,000 migrants, down from 6,000 in December.

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11:20 a.m.

More than 7,000 refugees and other migrants are camped on Greece's northern border with Macedonia, waiting for authorities to allow them to continue their long trek north to seek asylum in wealthier European countries.

The Idomeni crossing has been closed for nearly 24 hours, following clashes when hundreds of migrants tried to force their way into Macedonia, whose police responded with tear gas and stun grenades.

Hundreds of small tents stood Tuesday in the fields around an official migrant camp on the Greek side of the border that can take no more people.

Some migrants have been waiting at Idomeni for more than a week, as even when the border is open Macedonia allows in no more than a few hundred, citing a similar policy by Serbia further north.