Authorities in Texas say an 11-year-old girl was run over by a train that severed one of her legs and seriously injured the other.

Officers said Gisselle Marroquin was playing with friends on railroad tracks behind their homes east of Houston on Friday.

Harris County sheriff's Lt. John Legg said the children would grab the side of a slow-moving railroad car and let it pull them along. Gisselle slipped and fell under the train.

Alex Rodriguez, a spokeswoman for Memorial Hermann-Texas Medical Center said the girl was in critical condition Saturday.

Union Pacific spokeswoman Raquel Espinoza-Williams told the Houston Chronicle the two crew members in the locomotive never saw the girl.