Tight security was enforced across Europe tonight on the eve of the anniversary of the September 11 attacks on the US.

Police in Italy and Germany arrested three men today in a crackdown on alleged Islamic militants suspected of links to Osama bin Laden’s terrorist network.

As part of a European crackdown, police in Germany and Italy have arrested six people suspected of belonging to an Islamic terrorist group with ties to renegade Saudi millionaire Osama bin Laden.