
The bodies of six Syrians, two of whom were children, and three Lebanese including a woman, were discovered in a house and a nearby forested area near Baakline in the Chouf region, the source said.
Marwan Hamadeh, a Baakline-born MP, said it was a “crime of honour” by a man suffering “psychological disorders”, without giving further details.
Prime Minister Hassan Diab called for a speedy manhunt.
According to a preliminary police investigation most of the victims suffered gunshot wounds, while the woman had been stabbed, the source said.
The source did not say whether the victims were related to the killer, or indicate a motive.