They aren't cooperative. The article explains they didn't actually do anything. But international agreements on policing essentially compel police here to act (but not necessarily charge or return people).

For some reason, it is literally the same people who say that massive limitations need to be placed on native authority by international agreements, by courts (in some countries, depending on the legal system), etc. AND they say it is shocking that our police aren't sovereign...really? We cannot have it both ways...either you trust local authority or you trust the authority of foreign governments...it cannot be neither.