State Narcotics Criminal Investigation Department (NCID) chief Asst Comm Amran Ramli said the raids were conducted on Monday and Tuesday following surveillance by police.
"We arrested four men, aged between 27 and 40, at the parking lot of Sunway Batu Caves in Gombak at 4pm Tuesday.
"We confiscated 3.02kg of packaged syabu worth RM240,000 and seized three vehicles," he told reporters at the Selangor police headquarters Wednesday.
Acccording to ACP Amran, the drug distributors were arrested in the midst of a transaction with their clients.
One of the suspects had a criminal record.
Also caught red-handed by police during a drug transaction were three men, aged between 20 and 30, from a different syndicate.
They were arrested at about 1.50am Tuesday dealing drugs at an open space in Mutiara Damansara.
"They tried to escape but we managed to detain them and confiscated 2.5kg of syabu worth RM210,000. We also seized a vehicle," said ACP Amran.
Police are investigating if the two syndicates, both in operation for about a year now, were linked to each other.
All seven suspects will be remanded until Feb 8 under Section 39B of the Dangerous Drugs Act 1952, which is punishable by death upon conviction.