The 1245 AD structure, called Lal Mahal or Kushaki Lal, is located in Nizamuddin and was declared a heritage structure by the government and civic agencies. It was built by the Slave Dynasty ruler during the reign of Sultan Nasiruddin Mahmud Shah, before Balban ascended the throne.
On Friday, this structure was found partially demolished. Its prominent chhatris and red sandstone structure is said to have been pulled down. Residents said the demolition started late Thursday night. When alerted, Archaeological Survey of India filed an FIR with Nizamuddin police station on Friday.