Police are seeking an arrest warrant for another suspect whose DNA was found at the scene of last Tuesday's massacre at a security checkpoint in Yala's Muang district, which killed 15 and injured five others.
"Traces of blood belonging to Adam Musordee of Yala's Kabang district was found at the scene of the attack," Pol Maj Gen Piyawat Chalermsri, the deputy commissioner of the Provincial Police Region 9 overseeing the deep South, said on Thursday.
Pol Maj Gen Piyawat said that since the shooting took place, police officers have sought arrest warrants for three suspects.
"The other two suspects are Saudi Ting-useng and Natsarulo Sama, whose DNA were also found at the scene," said Pol Maj Gen Piyawat.
He stopped short of revealing the identity of the third suspect, saying his officers are gathering more witnesses and evidence.
Both Mr Saudi and Mr Natsarulo are wanted by the police over their alleged involvement in previous attacks in the restive South, including an attack on a security checkpoint in Yala's Krong Pinang district in 2017 which killed 12 people.
They are also wanted for the bombing and arson attacks on the Provincial Electricity Authority's regional office in Kabang district last year.