What appears to be a large petrol bomb has been discovered underneath a lorry in Paris. French media is reporting that bottles of petrol were discovered under the Franco-Swiss cement company Lafarge truck and they were connected to an ignition device. It was described as a ‘crude detonator device’ and was discovered in the 19th arrondissement – to the north west of the city, according to Le Figaro. Police and prosecutors are at the scene, according to a source close to the investigation. On Saturday an improvised explosive device was discovered close to Paris St Germain’s ground on Saturday morning, hours before they were due to play Bordeaux. Five people were taken into custody, including a terror suspect who was meant to be under surveillance, after four gas cylinders covered in petrol were found in the 16th arrondissement of the French capital. The four cylinders were linked to a mobile phone that could ignite them causing an explosion, investigators said this morning.