The attack would be in retaliation for the killing of Hamas leader Ismail Haniyeh in Tehran in late July, Ravid added.
Israel's chief military spokesman, Rear Admiral Daniel Hagari, blamed Sinwar for the Oct 7 attack and said Israel would continue to pursue him.
Iran has said the U.S. bears responsibility in the assassination of Haniyeh because of its support for Israel.
Wednesday's assassination has aroused fears of direct conflict between Tehran and its arch-enemy Israel in a region shaken by Israel's war in Gaza and a worsening...