The suspected killer of a doctor in Chiang Mai in December last year has been arrested by Interpol and will be brought to Thailand.

Chiang Mai police said on Thursday that the suspect, identified as Moroccan national Bilal Chefinu, 30, was arrested at a hotel in Turkey.

He is wanted in connection with the murder of Thitikarn Dulikanon, a doctor and owner of Doctor Sammy Clinic, who was found dead in her clinic in downtown Chiang Mai on Dec 6 last year.

Thitikarn was known to be living at the clinic with Mr Chefinu at the time. CCTV footage showed Thitikarn and Mr Chefinu entering the clinic together on Dec 4. Hours later, he was seen leaving the clinic alone in Thitikarn's car.

The car was found abandoned at Chiang Mai airport.

Thitikarn's body was discovered by a housekeeper on Dec 6.

The victim's sister said she lost contact with Thitikarn on Dec 4 but did not report her as missing because she assumed Thitikarn was travelling with her boyfriend.

An investigation found Mr Chefinu left the country for Hong Kong on Dec 5, prompting police to seek Interpol's help.

Police believe jealousy was the motive for the murder.