Amber Rudd has updated MPs on the investigation into the poisoning of a former Russian spy and his daughter.
Sergei Skripal and his daughter, Yulia, were poisoned in Salisbury on Sunday with a chemical that investigators have confirmed was a form of nerve agent.
The Government is facing growing calls to take tough action against Russia if it becomes clear that Moscow was involved in the apparent assassination attempt.
MPs will later hold a debate to mark International Women's Day.
Elsewhere, Liam Fox and John McDonnell are speaking at the British Chambers of Commerce annual conference.
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