FRENCH police investigating the discovery of a car packed with gas cylinders near Notre Dame cathedral in Paris have arrested a second couple.
The discovery last Saturday night of the Peugeot 607 loaded with seven gas cylinders, six of them full, triggered an inquiry by counter-terrorism experts in a country where more than 200 people have died in attacks over the past year and a half.
Police sources said on Tuesday that no detonator device was found in the car, but the presence of diesel-filled cannisters added to concerns that there had been a plan to explode the vehicle.
The two arrests late on Wednesday takes the number held in custody by police to four.
A first couple, aged 34 and 29, were arrested on a motorway on Tuesday in southern France.
The Peugeot was found in the early hours of Sunday morning on a Seine riverside road metres from the Notre Dame cathedral.
Documents with writing in Arabic were also found in the car, which had no registration plates and was left with its hazard lights flashing.