Police are still investigating the crash which killed a 23-year-old Frenchman last week and say it's too early to say if charges will be laid.

Nathan Luc Alain Boucher was killed on State Highway 2 on the stretch of highway known as the ‘Flying Mile' on Thursday afternoon.

Police are looking into a number of different factors before deciding if any charges will be laid following last week's fatal crash.

An investigation into the crash is ongoing but early indications are that a large object - thought to be a portable toilet - fell from a truck Nathan was following and into the path of his car.

To avoid the object, Nathan swerved into the other lane and into the path of an oncoming truck, say police.

The force of the crash caused the truck and trailer unit to roll onto its side into a bank off the road.

The highway was closed for several hours while police investigated the scene and worked to clear both the car and truck from the highway.

Speaking to SunLive this afternoon, Western Bay of Plenty road policing manager Senior Sergeant Ian Campion says police are looking at a number of different factors.

Part of the investigation looks at all aspects of the incident, including insecure loads, and determines whether there is any liability, or whether there were any mechanical issues.

'There is a whole raft of things we have to work through before we will be in a position to say what the outcome of the crash might be,” says Ian.