Three men are facing drug charges in what the RCMP say was part of a large-scale and sophisticated cocaine trafficking operation across the Golden Horseshoe.Investigators executed a search warrant on July 8 at Toronto condominium which police allege was being used to store and prepare cocaine for distribution. More than 170 kg of cocaine with an estimated street value of $4.5 million was seized.Tony Van Le, 39, of Hamilton, Cong Quang Van, 38, of Hamilton, and Hai Thanh Hoa Tran, 41, of Brantford have been charged with possession for the purpose of trafficking.Investigators say additional search warrants were carried out at several locations in Hamilton which resulted in the seizure of $165,000 in cash and jewellery believed to be proceeds of crime.