Two US officials also reportedly say a missile and drone attack could be launched as early as Friday evening
Middle East crisis – live updates
The US has warned that the threat of a significant Iranian attack on Israel remains “viable” despite Washington-led efforts, including calls to Tehran from the UK and Germany, to deter a serious escalation in the conflict in the Middle East.
The comments by the White House national security spokesperson, John Kirby, came as Israel’s defence minister, Yoav Gallant, said his country was “prepared to defend [itself] on the ground and in the air, in close cooperation with our partners”.