Agostino Cuntrera, 66, and his 48-year-old bodyguard were shot Tuesday afternoon outside an east-end Montreal restaurant said to be owned by Cuntrera.
Two men in a black Chevrolet Impala similar to one spotted leaving the scene were arrested shortly after the slayings. One of them was released while the other is still being held on unrelated charges, police told AFP.
Cuntrera was believed to have taken over the helm of the Rizzuto clan after the 2006 extradition to the United States of crime boss Vito Rizzuto on murder charges, according to public broadcaster CBC.
Described by local media as being 'old school,' low-key and shy of the limelight, he is the fourth Mafioso to be murdered since Rizzuto's arrest in 2004.
Vito Rizzuto is currently serving a 10-year sentence in Colorado for racketeering, related to three underworld murders in Brooklyn in 1981."