Two customs officers were among five arrested by police on suspicion of breaking into a Customs Department narcotics unit lot in Nilai on Sunday, and making off with RM30 million worth of drugs.

In a statement today, Customs Department director-general T Subromaniam confirmed the arrest, adding that other suspects picked up were two security guards and a member of the public.

"Police have obtained a six-day remand order for the suspects beginning today from the Seremban Magistrate’s Court.

"Customs are also conducting an internal investigation into the case and will take stern action against the perpetrators, including job termination, if they are found to have been involved in the robbery," he said.

Subromaniam also noted that Customs Armed Tactical Team (Cobra) personnel have been stationed at the narcotics unit lot in Kampung Jijan as an added security measure, while other stores for seizures have also been secured.

Berita Harian reported police sources as saying that about 10 masked men barged into the premises in 4WD vehicles and a car, and proceeded to assault and tie up the two security guards on duty.

They broke open a container and took away seven boxes of ketamine and heroin weighing up to 50kg.

Subromaniam said the container had been hauled from Port Klang to the Nilai narcotics office for further investigation.