Resident — Illegal construction

I am a resident of Mayur Vihar Phase-1 Pocket -3, Delhi-91. Illegal construction is a regular practice in this DDA flats. It is very dangerous to play with the original structure. At present illegal constructions r going on at 5-C, 5-D, 21-F etc. No body is bother abt this activities. It is our request to the concerned authorities to do something to stop this activities. Thanks.