Intelligence communities are split on whether Israel will carry out any form of strike against Iran. The facilities in question are likely to be non-civilian targets, and would, if executed, target Iran's nuclear weapons program and other aspects of their military.
Definitions:
Retaliatory strike - Any strike by Israel on Iranian territory (strikes on Iranian proxy groups not included).
Nuclear facilities - Any facility speculated to be doing research on nuclear weapons or nuclear technology.
1st of May in the GMT time zone.
Resolved yes.
Source:
What We Know About Israel’s Strike in Iran - The New York Times (nytimes.com)
I predict a retaliation, but I would be pretty surprised if it was against a target that would be guaranteed to escalate the conflict so severely. There is a lot more will among Western leaders to apply real pressure to Israel to use restraint against Iran than against Gaza. The consequences of a strike like this would probably be war.
Article from today making some similar points:
https://www.nytimes.com/2024/04/16/world/middleeast/israel-iran-allies.html