Chattogram Development Authority (CDA) on Tuesday started demolishing three risky buildings including one that tilted at Majhirghat in Sadarghat area of the port city on Monday night. CDA officials said a building tilted during the ongoing canal re-excavation work to end waterlogging in the port city. Read:3-storey building in Chattogram tilts Local people staged demonstrations in the area on Tuesday demanding compensation from the CDA authorities. Shahinul Islam, chief city planning officer of CDA, said “According to the CDA guidelines, a structure should be  established 15 feet off a canal and during the approval of the building the authorities concerned warned the owners of it . But the owners constructed the buildings adjacent to the canal ignoring the warning.” A notice was served on the owners before starting the re-excavation work of the canal, he said. Besides, the CDA authorities also asked them to show legal documents but they failed to show it. Read: Earthquake: 3 buildings tilt in Chattogram A building tilted towards a nearby building on Monday, triggering panic among locals. Besides, two building in the same area were identified as risky. A rescue team from Agrabad Fire Service Station managed to evacuate the residents of the building.