According to British journal the Lancet, Arafat was poisoned with the radioactive element polonium 210.
The journal published a peer review of last year’s research by Swiss scientists, who have been researching the suspicious circumstances surrounding Arafat’s death.
The earlier work “found high levels of the highly radioactive element in blood, urine, and saliva stains” on Arafat’s “clothes and toothbrush,” according to a report on Al Jazeera.
In July 2012, experts at Lausanne University, Switzerland, said they had evidence Arafat might have been poisoned with polonium.
The investigation into Arafat’s mysterious death led to the exhumation of his body in November 2012 for further testing.
The decision to exhume Arafat’s body was made after French prosecutors opened a murder probe into his death in August 2012 following the discovery of high levels of polonium on his personal belongings.
Arafat died in 2004 at the age of 75 in a Paris military hospital.
The analysis at the time was that he had a rare blood disorder.