Ed Miliband says Baroness Warsi has "acted with principle and integrity" in resigning from the Foreign Office over the Gaza conflict.
He added on Twitter that David Cameron should "break his silence" over Israel's "indefensible actions".
I think Baroness Warsi has acted with principle & integrity. People around Britain have been shocked by the suffering we have seen in Gaza.
David Cameron is right to condemn Hamas as a terrorist organisation but he needs to break his silence on Israel's indefensible actions.
More top news
Hundreds of jobs are under threat as 30 RBS and 128 NatWest branches are set to close due to a "dramatic shift" in the way customers bank.
Many areas experiencing bright spells.
The sports both net more than £10 million in public funds but will be forced to make the money go further than previous higher grants.