People gather in a corridor inside a building on the compound of a health and rest centre temporarily serving as accommodation for refugees from the eastern regions of the country in the town of Korostyshiv, Zhytomyr region, Ukraine, July 30, 2015. More than 400 people who left eastern Ukraine due to a military conflict have arrived at the sanatorium in Korostyshiv since the summer of 2014, according to representatives. (Photo by Valentyn Ogirenko/Reuters)

A boy looks out from a room inside a building on the compound of a health and rest centre temporarily serving as accommodation for refugees from the eastern regions of the country in the town of Korostyshiv, Zhytomyr region, Ukraine, July 30, 2015. (Photo by Valentyn Ogirenko/Reuters)

A boy looks through a bench as he plays near his mother on the site of a health and rest centre which serves as a temporary accommodation for refugees from eastern regions of the country in the town of Korostyshiv, Zhytomyr region, Ukraine, July 30, 2015. (Photo by Valentyn Ogirenko/Reuters)

Adults look at a girl as they sit on benches in the compound of a health and rest centre which serves as a temporary accommodation for refugees from eastern regions of the country in the town of Korostyshiv, Zhytomyr region, Ukraine, July 30, 2015. (Photo by Valentyn Ogirenko/Reuters)

A security personnel plays with a girl in the compound of a health and rest centre which serves as a temporary accommodation for refugees from eastern regions of the country in the town of Korostyshiv, Zhytomyr region, Ukraine, July 30, 2015. (Photo by Valentyn Ogirenko/Reuters)

Children wait before taking a piece of a cake during a birthday party at a health and rest centre which serves as a temporary accommodation for refugees from eastern regions of the country in the town of Korostyshiv, Zhytomyr region, Ukraine, July 30, 2015. (Photo by Valentyn Ogirenko/Reuters)

Children sit around a table during a birthday party at a health and rest centre which serves as a temporary accommodation for refugees from eastern regions of the country in the town of Korostyshiv, Zhytomyr region, Ukraine, July 30, 2015. (Photo by Valentyn Ogirenko/Reuters)

A woman sits on a bench as boys play in the compound of a health and rest centre which serves as a temporary accommodation for refugees from eastern regions of the country in the town of Korostyshiv, Zhytomyr region, Ukraine, July 30, 2015. (Photo by Valentyn Ogirenko/Reuters)

Children play in the compound of a health and rest centre which serves as a temporary accommodation for refugees from eastern regions of the country, with a dog seen in the background, in the town of Korostyshiv, Zhytomyr region, Ukraine, July 30, 2015. (Photo by Valentyn Ogirenko/Reuters)

Children run in the compound of a health and rest centre which serves as a temporary accommodation for refugees from eastern regions of the country in the town of Korostyshiv, Zhytomyr region, Ukraine, July 30, 2015. (Photo by Valentyn Ogirenko/Reuters)

People sit on benches in the compound of a health and rest centre which serves as a temporary accommodation for refugees from eastern regions of the country in the town of Korostyshiv, Zhytomyr region, Ukraine, July 30, 2015. (Photo by Valentyn Ogirenko/Reuters)