Canadian aviation authorities have banned printer toner cartridges weighing more than 454g from checked baggage and carry-on luggage on flights after the Yemeni mail bomb threat.
Transport Minister Chuck Strahl said that passengers on outbound flights from Canada to the US are not permitted to travel with cartridges in carry-on bags.
The Canadian security measure follows after a similar announcement made by the US Homeland Security secretary Janet Napolitano.
Air Canada has ordered its staff to carry out extra security checks on anyone connected to Yemen at main airports in Canada, according to the Xinhua News Agency.
The move has been taken after two bombs hidden inside printer toner cartridges in cargo packages were addressed to synagogues in Chicago, US.
Canada has banned all air cargo originating from Yemen and Somalia.