Met Police commissioner Sir Mark Rowley says he is monitoring the "disturbing scenes" from Belfast, while his force is keenly aware of the risk of social media-fuelled disorder. Speaking to the BBC, he said there is an ongoing risk from extremist online commentary - particularly from young men who become "violence-fixated individuals". He added: "This is quite a difficult issue, where other countries want to sow disorder on the streets of the UK". Tap the link in @BBCNews's bio for the latest on the unrest in Northern Ireland. #Belfast #NorthernIreland #MetPolice #BBCNews