A 17-year old boy was arrested Thursday morning in the south London district of Thornton Heath, in connection with last Friday’s bombing attack on a London Tube train. Four other men were arrested on Tuesday and Wednesday. Police continue to question Yahyah Farroukh, a Syrian refugee of 21, who was arrested in west |London Saturday night, as well as the first suspect taken into custody, who is an 18-year old refugee from Iraq. He was caught trying to board a ferry to France at Dover. Farroukh is the only suspect to be named by the police.