The fifth man wanted following a major bust by the Yukon RCMP's anti-drug squad has been arrested, according to court documents.

Ryan "Bobby” Derkson was arrested Tuesday without incident upon his arrival at the Erik Nielsen Whitehorse International Airport.

A warrant was issued for the 26-year-old man's arrest following a four-month undercover operation which relied heavily on information and evidence collected by a police informant, according to the RCMP.

Last Thursday, officers executed search warrants on two Copper Ridge homes.

They seized $120,000 in cash, several vehicles and a selection of weapons, including baseball bats and brass knuckles.

At the same time, they arrested four men and laid charges including conspiracy to traffic cocaine and possession of illegal substances.

An amount of cocaine and Ecstasy was also taken in by police during the raid.

However, as the head of the operation, Cpl. Blake Wawryk noted earlier this week the bulk of the drugs confiscated by police were delivered to them over the past four months by the informant who was recording purchases and communications on behalf of investigators.

The informant brought in more than a kilogram of cocaine and 1,300 tablets of the drug Ecstasy, Wawryk said.

During a press conference following the arrests, police alleged the men are "at the very top of the trafficking food chain.”

Derkson was one of the men police hoped to arrest at the time of the bust, but it was not until two days ago that the suspected drug trafficker was brought into custody.

Derkson and two of the men arrested last Thursday, Shaun "Duke” Naidu and Jesse Ritchie, were scheduled to appear in territorial court this afternoon to apply for bail.

Ritchie, 30, faces one count of conspiracy to traffic cocaine.

Naidu, 28, is up on three counts of drug possession, including Ecstasy and anabolic steroids; two counts of possession of property obtained by crime and one count of failure to comply with a probation order.