SNIPPET: "COPENHAGEN (AFP) — A grenade tossed into a cafe, gunfire in the street, dead bodies splayed on the pavement, residents living in fear -- all sounds out of sync with the medieval cobbled streets and copper roofs of the Danish capital. But a bloody gang war between bikers and youths of immigrant origin has shattered Copenhagen's customary calm and jolted officials to boost action against violence that has left three dead and 17 wounded in seven months. [...] The battle over drug sales, revenge and wounded honour pits Hells Angels bikers and their offshoot called AK81 against gangs of...