The Maharashtra Rajya Suraksha Rakshak Union submitted an application at the Bandra-Kurla Complex (BKC) police station here Monday, claiming the remark was an “insult” to security guards, a police official told PTI Tuesday. The association has claimed that during his rally at the MMRDA grounds here earlier this month, Gandhi said that “chowkidar chor hai” (the guard is the thief), police said.