In April 2007, the Tehran police began the most fierce crackdown on "bad hijab" in more than a decade. In the capital Tehran thousands of Iranian women were cautioned over their poor Islamic dress and several hundred arrested. In 2011, an estimated 70,000 police in Tehran alone, patrolled for clothing and hair infractions. As of 2011, men are barred from wearing necklaces, “glamorous” hairstyles, ponytails, and shorts. Neckties are forbidden in the holy city of Qom. After a leading cleric (Hojatoleslam Gholamreza Hassani) issued a fatwa against keeping dogs as pets, a crackdown on dog ownership commenced.