JAKARTA, Jan. 25 (Xinhua) -- Indonesian police confiscated 149 kg of crystal methamphetamine smuggled through the waters north of Sumatra Island and arrested six suspects.

The National Police's anti-narcotics division chief Krisno Siregar said that five couriers were arrested on Sunday when a fishing ship carrying them entered Aceh waters.

"On the ship, we seized four sacks and a fiber box containing 149 kg of methamphetamine," Siregar said on Wednesday.

Tarmizi alias Tambi, arrested the same day in West Java, directed the five to smuggle methamphetamine.

Police are still on the lookout for a fugitive who is in charge of the smuggling operation.