Several Kalashnikovs have been found in an abandoned car believed to have been used by some of the Paris attackers, French judicial sources say.The black Seat car was found in the eastern Paris suburb of Montreuil on Sunday, suggesting some of the attackers got away.Earlier, the first of the seven dead attackers was named as Ismail Mostefai. Six people close to him are in custody.Two attackers lived in the Brussels area, Belgian prosecutors said. France is in three days of mourning for the 129 people killed in the attacks.Prime Minister Manuel Valls said most of the bodies had been identified and that the process should be completed in the coming hours. A special service for the victims, including 350 people wounded and other survivors, is being held at Paris’s Notre Dame Cathedral later on Sunday.Friday’s attacks, claimed by Islamic State (IS) militants, hit a concert hall, a major sports stadium, restaurants and bars in the French capital.The Seat car found in Montreuil is believed to have been used by gunmen who opened fire on people in restaurants on Friday, police say.Several AK47 rifles were found in the car, French media quote judicial sources as saying.This appears to confirm the theory that some of the gunmen managed to flee after the attacks, the BBC’s Hugh Schofield reports from Paris. These men may then have driven north in another car to Belgium, he adds.One of the Paris attackers lived in Brussels and another in the nearby town of Molenbeek, Belgian prosecutors said on Sunday. On Saturday a total of seven men were arrested in Molenbeek, they added.Paris chief prosecutor Francois Molins has said that a Volkswagen Polo rented by a French national living in Belgium was found near the Bataclan concert venue, where nearly 90 people were killed.”We can say at this stage of the investigation there were probably three co-ordinated teams of terrorists behind this barbaric act,” Mr Molins said.”We have to find out where they came from… and how they were financed.”A Syrian passport, found near the body of one of the attackers at the Stade de France, had been used to travel through the Greek island of Leros last month, Greek officials have confirmed.Serbia says the holder of that passport had also crossed its border from Macedonia and sought asylum at one of its registration centres. No direct link has yet been made with the holder of the passport and the attackers.Mostefai was reportedly identified after investigators found a severed finger at the scene of the worst atrocity, the Bataclan concert hall.He came from the town of Courcouronnes, south of Paris, and had lived in the city of Chartres 100km (60 miles) south-west of Paris until 2012 and had regularly attended a mosque there.Attack sites:Mostefai, 29, had a history of petty crime but was never jailed. The security services deemed him to have been radicalised in 2010 but he was never implicated in a counter-terrorism investigation.Police are said to be trying to find out whether he travelled to Syria in 2014.His father, brother and sister-in-law are among six people close to Mostefai who have reportedly been taken into police custody.His brother said he had not had contact with him for several years following family disputes, but said he was surprised to hear he had been radicalised.He was one of six children in the family and had travelled to Algeria with his family and young daughter, the brother said.