The government has been urged to open an investigation into claims former prime minister Liz Truss’s phone was hacked while she was foreign secretary.
The Mail on Sunday reported private messages between Ms Truss and foreign officials, including about the Ukraine war, fell into foreign hands.
The hack was discovered during the summer Tory leadership campaign but the news was suppressed, the paper said.
The government said it had “robust” cyber-threat protection in place.
The spokesperson added that the government “did not comment on individuals’ security arrangements”.