Six men have been arrested after drug raids in Hurstville and Turella today.
Strike Force Smith was established by Northern Beaches police to investigate the cultivation and supply of cannabis in the area.
About 8am today police searched four premises as part of co-ordinated raids.
At an industrial unit on Carter Road at Brookvale officers seized 321 cannabis plants and hydroponic equipment.
At an industrial unit on Villers Road at Cromer officers seized 244 cannabis plants and a large amount of cannabis leaf.
At a Hurstville home police seized about $20,000 in cash.
At a Turella house officers seized about $6000 in cash.
The total amount of drugs seized has an estimated potential street value of about $3 million.
Following the search warrants six men aged between 20 and 63 were arrested.
All six men were taken to Manly Police Station.
Anyone with information should contact Crime Stoppers on 1800 333 000.