The explosion happened just days before a United Nations tribunal is expected to issue its verdict on four alleged Hezbollah members accused of killing former Lebanon Prime Minister Rafic Hariri in a 2005 car bombing on the Beirut seafront.

This statement is in the Fox news article:

'Some reports said there might have been a second blast Tuesday across the city near the Hariri family residence.'

Seaport boom may be symbolic reminder?; Hezbollah also threatening the family? Anybody have sauce for the second explosion?

https://www.foxnews.com/world/explosion-lebanon-capital-beirut