<p>A case has been registered against four police personnel in Gwalior after a family filed a complaint of alleged assault and threats over the issue of playing loud music, said Gwalior police on August 28. "On Friday night the incident happened in Bhitarwar, police personnel went to stop the loud music. “The family has filed an FIR of assault and threat," said Gwalior SP. “Police have also filed an FIR against the family for hindrance in peace," he further said. An investigation has been initiated.</p>