Passengers on board Air Canada Flight 030, which landed in Vancouver around 11:30 a.m. PT on Sunday, entered the country without being screened by Canada Customs after they were "misdirected" to the Domestic Terminal.
On Wednesday, the Canada Border Services Agency said in a statement that all passengers have been "identified and accounted for with database checks." However, three people still need to be screened by customs.
The border agency says that is expected to happen sometime in the "coming days."
Air Canada says it has launched an internal investigation into what happened and why.