
The raid on Thai Max Group in Pathum Thani’s Lam Lukka district was led by Deputy Police Commissioner-General Pol General Srivara Ransibrahmanakul at 8am.
A caretaker of the two-storey house, which is located on a 100-rai plot, was taken for questioning to Kukot Police Station.
The raid found many assault rifles, grenades and ammunition in crates, according to the police.
Srivara will hold a press conference at 11am to announce details of the raid and the findings.
Seen as a leader of an extremist red-shirt group, Wutthipong has reportedly fled the kingdom.
A police source said the caretaker was identified as Thirachai Udonchian, who admitted that he was asked to move the weapons from from the community radio station of Wutthipong.
He was taken to the 11th Army Province for seven-day detention and questioning.