It was planed in advance.

https://www.veteranstoday.com/

Israeli Knesset ex Member: “Thank God for Beirut blast! As a nuclear bomb”

Voltairenet: Israel Destroys East Beirut with ‘new weapon’

Source: Israel Planned the Nuke Attack on Beirut Years in Advance, Exactly How they Did it

Israel hits Beirut with nuclear missile, Trump and Lebanese Govt. confirm (New infrared images from 2 cameras)