London police didn't have to go far to make a drug bust Wednesday -- the location was across the street from police headquarters.

Officers wearing face masks and breathing apparatuses could be seen inside the ground-floor unit of 544 Dundas St. in the afternoon. An ambulance was parked outside.

Members of the guns and drugs section, along with the RCMP, searched the home and arrested multiple people, police said.

The investigation is in its early stages and more information will be released Thursday, police said.