Dolev Zuarez and Eyal Bokal were arrested on Sunday at a Bangkok airport for allegedly stabbing to death Mallil, 34, and injuring his girlfriend Rashel Oshana in broad daylight at the popular tourist area of Chaweng Beach. 
The duo, who were brought back to Surat Thani to face murder charges, were taken to Amper Koh Samui Hospital. 
Dr Theerasak Wiriyanon, hospital director, said police requested urine and blood tests for both suspects to know whether they had consumed any drugs before allegedly committing the crime. 
After the tests, they were brought back to the police station for further investigation. 
Pol Maj-General Angkoon Klaiklueng, the regional tourism police commander, on Monday said police were informed by the Israeli Embassy in Bangkok that the victim had been sentenced by an Israeli court to 20 months in jail for trying to run over both suspects before opening fire on them. 
The suspects allegedly followed him to Koh Samui to get revenge. They allegedly tried to run him down, and then used a knife to stab him to death.

Israeli revenge-killing suspects taken for drug tests

Surat Thani - Special forces officers on Tuesday accompanied two Israeli murder suspects from a police-station cell in Samui district to have drug tests and physical examinations.