The seizure of five kilograms of cocaine from a home in Theodore is the largest seizure of the drug in Canberra's history, according to ACT police.

Key points: Shaun Claude Small, 28, is charged with trafficking a commercial quantity of prohibited drugs

Shaun Claude Small, 28, is charged with trafficking a commercial quantity of prohibited drugs Police say the cocaine was destined for outer-lying suburbs in the ACT

Police say the cocaine was destined for outer-lying suburbs in the ACT Officers have not ruled out more raids or arrests

Officers raided the home in Canberra's south yesterday, acting on tip-offs from the public.

They allegedly found the five bricks inside the house, wrapped in black plastic, and preliminary tests of the substance found it to be cocaine.

Police estimated the 5kg amount held a street value of $1.5 million.

Theodore man Shaun Claude Small, 28, was subsequently arrested, and charged with trafficking a commercial quantity of prohibited drugs.

He appeared in the ACT Magistrates Court this morning, where he pleaded not guilty to the charge and did not apply for bail.

Detective Superintendent Scott Moller said there was more police work to do in establishing where the drugs came from and where it was heading.

"The investigation is only in the initial stages, we've located this five kilograms," he said.

"That five kilograms was destined for the ACT, and possibly outer-lying suburbs and locations around the ACT."

Police looking into wider, organised crime network

Mr Small was the only person to be charged following the seizure, but police said more arrests and raids were possible.

Detective Superintendent Moller said there were suggestions an organised criminal network, with links outside the ACT, could be involved.

"There is certainly information that this is part of a much wider network," he said.

"We're still in the infancy of this investigation.

"At this stage there is no link to outlaw motorcycle gangs. What I can say though is this is part of an organised crime syndicate."