A woman looks out from a bomb shelter in Donetsk, eastern Ukraine, on January 28, 2015. Some local residents live in bomb shelters for more than a month, looking for cover from artillery strikes. Photo: Xinhua

A woman sits inside a bomb shelter in Donetsk, eastern Ukraine, on January 28, 2015. Some local residents live in bomb shelters for more than a month, looking for cover from artillery strikes. Photo: Xinhua

A woman walks outside from a bomb shelter in Donetsk, eastern Ukraine, on January 28, 2015. Some local residents live in bomb shelters for more than a month, looking for cover from artillery strikes. Photo: Xinhua

Family members chat in a bomb shelter in Donetsk, eastern Ukraine, on January 28, 2015. Some local residents live in bomb shelters for more than a month, looking for cover from artillery strikes. Photo: Xinhua

A woman sits inside a bomb shelter in Donetsk, eastern Ukraine, on January 28, 2015. Some local residents live in bomb shelters for more than a month, looking for cover from artillery strikes. Photo: Xinhua

Children are seen in a bomb shelter in Donetsk, eastern Ukraine, on January 28, 2015. Some local residents live in bomb shelters for more than a month, looking for cover from artillery strikes. Photo: Xinhua