The North African branch of al-Qaeda has blamed Lebanese group Hezbollah for the deadly bombings in the city of Tripoli, according to the US-based SITE monitoring service.
AQIM, al-Qaeda's north African branch, said in a tweet that it knew “with certainty” that Hezbollah was responsible for the twin blasts that have killed at least 42 people.
It added: "That vile party... should know that it will meet retribution soon.”
More top news
Charles Bronson - Britain's most notorious prisoner- has sent Alton Towers crash victim Leah Washington a get well picture
Susannah Mushatt Jones from New York is known as Tee, short for auntie, to her 100 nieces and nephews.
The tweet said: "Our lionesses go back to being mothers, partners and daughters today, but they have taken on another title - heroes."