GENEVA — The Latest on Europe's migrant crisis (all times local):

5:20 p.m.

Greek regional authorities are threatening to shut a migrant camp on the Aegean Sea island of Lesbos unless the government takes quick action to improve conditions there.

The northern Aegean regional authority says the Moria camp is "unsuitable and a threat to public health and the environment."

Conditions at the camp for migrants newly-arrived from Turkey have been repeatedly criticized by human rights groups.

Authority chief Christianna Kalogerou said Monday that if government officials take no corrective action in 30 days, she will close the camp.

She said the camp, where 8,800 people live in facilities for 3,100, has raw sewage flowing out of its main entrance. The letter said the bathrooms stink, the dining area fails legal standards and uncollected garbage lies rotting around bins.

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4:05 p.m.

The new U.N. human rights chief has announced plans to send teams to Italy and Austria to examine migrants' treatment, drawing a quick retort from Vienna.

Michelle Bachelet said Monday that her office will "assess recent developments" in Austria regarding migrants. She added that "we also intend to send staff to Italy, to assess the reported sharp increase in acts of violence and racism against migrants, persons of African descent and Roma."

Both countries' governments take a hard line on migration.

Chancellor Sebastian Kurz said he welcomed an "opportunity to rectify prejudices" about Austria.

He said that "we hope that, after this examination, the U.N. will again have time and resources to dedicate to those countries where torture and the death penalty are on the agenda."