Late-night clashes occur at Jantar Mantar involving protesters and police, according to video footage circulated by NDTV. The footage shows a large crowd of agitated protesters raising slogans and attacking police personnel, while some individuals in the area attempt to control or break up the gathering. Police use teargas during the incident. NDTV reports that senior police officers are injured in the clashes. The reporting describes the situation as volatile, with confrontations between protesters and security personnel continuing through the night. The available information is limited to the incident at Jantar Mantar and the immediate aftermath referenced in the video accounts, including the use of teargas and the injury to senior cops. No additional confirmed details about the cause of the protest, the number of people injured among protesters, or any arrests are included in the provided summaries. Overall, the sources agree on the core events: a confrontation between protesters and police, use of teargas, and injuries to senior police personnel.