There weren't only a huge number of cross-border shoppers and tourists who were trying to get across the U.S.-Canada border south of Vancouver on the Canada Day long weekend — there were also drug runners and some confused ferry seekers.

The Canada Border Services Agency says its officers processed more than 120,000 travellers at four crossings, a 25 per cent increase over the same weekend last year.

The agency says two Americans were arrested at the Douglas crossing when a search of their rented vehicle turned up about 3.5 kilograms of suspected cocaine hidden in the gas tank.

Another American was arrested at the Pacific Highway crossing when a search of her luggage found some marijuana, while three other travellers were taken into custody when officers found child pornography on a phone.

Then there were the two Alberta residents who showed up at the Douglas border crossing looking for the ferry to Nanaimo.

Instead of directing them to the ferry terminal, officers arrested one of the men after finding some marijuana in his backpack.