Foreign Secretary Philip Hammond says Baroness Warsi's resignation from his department over Gaza "came as a surprise".
He said the former Foreign Office minister had done a "fantastic job" but added: "I do find it surprising that she has chosen now, this particular moment, to take this stand when at long last we are seeing some relief, some progress on the issues about which she was so passionately concerned."
Asked about the criticism of other politicians, who have called for tougher language against Israel, Mr Hammond said he had to take a more "dispassionate" view on the conflict to ensure peace.
More top news
Theresa May outlined her objectives for Brexit negotiations on Tuesday, but what did people from both sides of the referendum make of it?
Milder Atlantic air into the north with colder, Continental air into the south.
A report produced for the British government criticised the security at the Riu Imperial Marhaba hotel where 38 people were killed in 2015.