More than a dozen high-ranking “ultra” fans from football clubs AC Milan and Inter Milan have been arrested in a large-scale raid by the Italian police in the country’s second city. The suspects are accused of extortion, assault and other crimes, the police announced on Monday. Some of those arrested are also accused of having close links to the mafia. The anti-mafia authorities are investigating. Sixteen men were remanded in custody and three others are now under house arrest. According to police, the specific allegation is that the ultra groups of the two city clubs are said to have formed a…