A baby less than a year old was among 10 children taken into care after a police operation targeted gangs who used youngsters to pick pockets.
Officers from several forces, including the Metropolitan Police, raided 17 addresses across Slough, Berkshire.
At least 25 adults were held, accused of immigration breaches, deception, fraud, theft and pick-pocketing.
The inquiry surrounds child trafficking from Romania and the welfare of the children involved.