Harpon, who was partly deaf, used a kitchen knife and an oyster shucker to kill three police officials and an administrative staffer - three men and a woman - and injure two others in a 30-minute lunchtime rampage that ended when an officer shot him in the head.
A man wielding a knife stabbed and killed four officers at the police headquarters in the heart of central Paris on Thursday, before being shot dead.
Four of the victims suffered severe wounds, the source said.
Neither Abdeslam nor co-accused Sofien Ayari, who Belga said was also found guilty, were in court to hear the ruling on Monday.
The attackers, Abdelhamid Abaaoud and Chakib Akrouh, hid out in Jawad Bendaoud’s flat after they and a group of other gunmen and suicide bombers killed 130 people in 2015.
The new legislation would see many of those emergency powers enshrined in law, with limited oversight from the judiciary.
Four people were wounded outside the mosque while a family of four in their apartment some fifty metres away took shrapnel.
The man’s motives were unclear, and he had not succeeded in reaching the crowd because of barriers in front of the mosque, police said in a statement.
The man was placed on France’s so-called ‘Fiche S’ watch list after he was found to belong to a radical Islamist movement, two police sources said.
The assailant wounded one officer before he was shot and wounded by other officers.
Macron is the opinion polls’ favourite to win the first round and beat National Front chief Marine Le Pen in the two-person run-off on 7 May.
The killing of a policeman by a suspected Islamist militant pushed national security to the top of the French political agenda ahead of the presidential election.
The killing of a policeman by an Islamist militant threw a dark shadow over the last day of an unpredictable campaign.
In November 2015 two of the 10 known perpetrators were Belgian citizens and others lived in Belgium.
The latest in a series of attacks in France forced the evacuation of France’s second-busiest airport.
The 29-year-old, identified as Abdullah Reda al-Hamamy, was shot several times on Friday after he set upon soldiers with a pair of machetes.
Hamyd had been questioned by police following the Charlie Hebdo attacks but was cleared.
In May, France sought the extradition of Mohamed Amri, who reportedly drove to Paris after the attacks.
