sa casualties are mounting, ukraine's interior ministry reports since russia launched unprovoked attack on wednesday, 352 civilians including 14 children killed, nearly 1,600 injured, 116 of them children. many fled to neighboring countries. >> from suffering, i think of the kids because there were so many little kids and it was freezing outside. i had to stay all night outside so just taken that from first border, to second border, third border. >> fierce resistance by ukrainian forces and armed civilians have stopped at least one attempt by russian troops to advance into a major city today. cnn's alex marquardt has more on that. alex. >> reporter: pam, the ukrainians are defying expectations in this fight, so far, keeping the russians at bay from the major