Four people, including three women from China, were arrested during the raids, which started at 4.30pm on Thursday.

Bukit Aman narcotics criminal investigation department director Ayob Khan Mydin Pitchay said the suspects were aged 48 to 56.

He said each condominium unit had been rented for RM2,500 a month and converted into a drug processing laboratory.

“They were believed to have been active since late last year. Also seized during the raids were two vehicles, cash, watches and jewellery,” he told a press conference at Bukit Aman here today.

Ayob Khan said checks revealed that the three foreign women entered the country four to five years ago on social visit passes.

He said all those arrested tested negative for drugs and had no criminal records. They were remanded for seven days to assist in investigations under Section 39B of the Dangerous Drugs Act 1952.

Meanwhile, Ayob Khan said police were in the midst of completing the investigation paper on the arrest of a former Malaysian diplomat and his son for allegedly owning a cannabis farm in Janda Baik, Pahang, on May 21.

“The 78-year-old former diplomat was released on police bail after his remand period ended yesterday, and his son is still being remanded until tomorrow,” he said.

He added that the investigation paper would be submitted to the Attorney-General’s Chambers soon.

It was reported that a former diplomat, with the title of Datuk, and his 53-year-old son had been detained on suspicion of growing 102 cannabis plants in the compound of a house in Kampung Sum Sum in Janda Baik.