Embattled minister Priti Patel is on her way back to London having cut short an official trip to Africa, Sky News understands.
The International Development Secretary is under pressure over a series of undisclosed meetings she held with Israeli political figures.
Ms Patel apologised earlier this week but details of two further unauthorised meetings have since emerged.
It has put the Prime Minister under new pressure to sack the Cabinet minister.
It is understood Ms Patel met Israel's public security minister Gilad Erdan in Parliament on 7 September and foreign ministry official Yuval Rotem in New York on 18 September.
Theresa May was reportedly told about the New York meeting on Monday but only learned about the meeting with Mr Erdan on Tuesday.