Police in Sweden is investigating notes posted through letterboxes in the country with the message "We'll behead you in your home unless you convert to Islam!!!"

Police in Sweden are investigating chilling letters posted through letterboxes across the country threatening to behead people unless they convert to Islam. The notes (pictured inset), which are signed ISIS and carry the terrorist organisation's flag, threaten to decapitate 'non-believers' unless they become a Muslim or pay a religious tax. They have been distributed among several cities including Stockholm and warn 'the police will not save you from being murdered'.
....is UN listening?