The government “cannot exclude” a criminal investigation into leaks from a meeting about using Huawei technology for the UK’s 5G network.
Culture Secretary Jeremy Wright condemned the leaks from a National Security Council meeting, after ministers called for a “full and proper” investigation.
The supply of equipment by the Chinese firm was approved by government, despite warnings of a security risk.
Huawei denies its products pose a risk.
Mr Wright said: “We cannot exclude the possibility of a criminal investigation here and everyone will want to take seriously that suggestion.
“But, I think we are all entitled to say what I think many of us have already said about the undesirability of this kind of leak and it is perfectly proper for the House to express its concern in the way it has.”