Police said the two people killed in a crash on the M11 yesterday were a brother and sister.
The crash happened near junction 8 at Birchanger yesterday afternoon. The dead pair are believed to be a 53-year-old man from the Netherlands and a 45-year-old woman from Kent.
Their family has been informed but they have not been formally identified.
They were in a Toyota car that was struck by other vehicles and collided with the rear of a Mercedes horse box, with five horses on board. The car caught light with the impact. They died at the scene.
Two people were taken to hospital. Their injuries are nor believed to be life threatening.
The driver of a lorry was arrested on suspicion of causing death by dangerous driving. The 49-year-old man from Staffordshire was questioned and later released on police bail until September 15.