Six Romanian children have been taken into police protection after being found working in a Worcestershire field, the Gangmasters Licensing Authority (GLA) has said.
The children, five girls and two boys, were discovered picking spring onions in near freezing conditions in a field in the Kempsey area of the county.
A spokesman for the GLA said: "The temperature was nearing freezing point," he said. "On the field two groups were identified. One was a group of 50 Romanians where no licensed gangmaster could be established, this included a number of children.
"There was also a small group of Indian workers who were working for a licensed gangmaster."
The spokesman added: "Seven Romanian children were found picking spring onions, the children are between the ages of nine and 15. Some were working with their parents but others were not.
"West Mercia Police took six of the children into police protection.
"The workers and children were not dressed adequately to protect themselves from the cold conditions."
The spokesman said no arrests were made, adding that a joint investigation by the GLA and West Mercia Police was ongoing.
A spokesman for West Mercia Police said: "There has been no further update since the initial action, the bottom line is that it is an ongoing investigation between the police and the licensing authority."