The regulator said it had serious concerns about Accident and Emergency departments and medical wards at both Princess Royal Hospital and the Royal Shrewsbury Hospital, and had taken urgent action to step in to protect the safety of patients.
The trust is currently rated as inadequate.
Last month a leaked report about the trust told of the deaths of 45 mothers and babies a”toxic” culture stretching back 40 years.
The investigation, part of an independent inquiry ordered by the last Health Secretary, warns that failings date back four decades, in what is likely to be the worst NHS maternity scandal in history.
Staff at the trust routinely dismissed parents’ concerns, were unkind, got dead babies’ names wrong and, in one instance, referred to a baby who died as “it”.