A loud explosion struck a neighborhood in south Beirut this morning, Lebanese security officials said.
The nature of the explosion in the suburb of Bir el Abed, a stronghold of the Shi'ite group Hezbollah, was not immediately clear, the unnamed officials told the Associated Press.
Some Syrian rebel groups have threatened to strike in Lebanon after Hezbollah joined Syrian President Bashar al Assad's troops in their battle against opposition fighters.
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Commuters were also warned to expect travel chaos as Doris gathered speeds of nearly 90mph.
A man with 62 penalty points on his licence is among thousands of motorists allowed to drive despite exceeding the limit warranting a ban.
Storm Doris is set to bring severe weather across much of the UK on Thursday as heavy rain and strong winds push in from the west.