i dony know if all the punjabi groups are linked together but there have been some recent investigations involving inter province cooperation.
i will try to find info, there was one involving cannabis flowing from bc to ontario for further transport to the US. same bust involved cocaine and tobacco smuggling.
also in some of these cases the transport truck drivers at times are un wittingly carrying drugs across borders. in other cases they are directly involved.
one thing for sure it is predominantly south east asian drivers being busted the most over past 2 years in the western ny/southern ontario corridor. this trafficking route is becoming one of the busiest for cocaine imports into canada.