The Supreme Court on Friday expressed concern over rampant unauthorised constructions across the country and asked the Centre as to how long these will continue.

Referring to a fire incident in Crystal Tower in Parel that claimed four lives and earlier incidents of fire in Kamala Mills in Mumbai and Bawana factory in Delhi, a bench of Justice Madan B. Lokur and Justice Deepak Gupta asked: "Has the government of India any policy that unauthorised constructions will not be tolerated? This can't be tolerated."