A series of co-ordinated raids by Ontario Provincial Police and Hamilton police led to the arrest on Tuesday morning of seven suspected members of the Hells Angels.
The raids were carried out in communities west of Toronto, targeting members of the motorcycle gang.
A spokesman for the OPP said the raids netted about $215,000 worth of drugs, as well as weapons and other property.
A number of police forces were involved in the raids including the Waterloo Regional Police Service, the Niagara Regional Police Service, York Regional Police, the Halton Regional Police Service, and the RCMP.
Five residences were searched in Hamilton, Waterloo and Nanticoke.
A loud explosion woke neighbours in one Hamilton residential neighbourhood while police were carrying out their raid just before 7 a.m. It's believed the sound of the explosion came from a police flash grenade.
"The Hells Angels are criminals and as such they are not welcome in our communities," said OPP Supt. Dan Redmond in a prepared statement.
"Our enforcement initiatives make it clear that the Hells Angels are involved in drugs, weapons, and violence related offences"
All seven of those taken into custody are male. They will face a number of drug related charges, according to police.