SIRET, Romania (AP) — One man was detained in Poland suspected of raping a 19-year-old refugee he’d lured with offers of shelter after she fled war-torn Ukraine. Another was overheard promising work and a room to a 16-year-old girl before authorities intervened.

Another case inside a refugee camp at Poland’s Medyka border, raised suspicions when a man was offering help only to women and children. When questioned by police, he changed his story.

As millions of women and children flee across Ukraine’s borders in the face of Russian aggression, concerns are growing over how to protect the most vulnerable refugees from being targeted by human traffickers or becoming victims of other forms of exploitation.

“Obviously all the refugees are women and children,” said Joung-ah Ghedini-Williams, the UNHCR’s head of global communications, who has visited borders in Romania, Poland and Moldova.

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