Naomi Campbell was mugged in Paris as she was trying to hail a cab last month, sources tell the New York Post. A ligament in her leg was torn when she was pushed to the ground, and she's been using a wheelchair and crutches since. One source says the supermodel hasn't spoken about the attack because French police are still looking for the assailants. "It was terrifying," says a source. "Naomi believes the assailant had been watching her, casing her out, and waited for a moment to strike when she was alone." It's not clear what was stolen from her.