New Delhi, Nov. 4 -- The Supreme Court on Tuesday took note of a Hindustan Times report exposing the open sale of conventional and unauthorised firecrackers in Delhi markets despite restrictions imposed by the court a day earlier, asking the Centre, state government and police to take necessary measures to prevent violations. The observations came as Delhi's pollution levels continued to surge, with the air quality index (AQI) on Tuesday according to the Central Pollution Control Board's (CPCB) official 4pm bulletin rising to 350 at 4pm, worse than 324 the previous day. By 10pm, it worsened to 355. The bench of justices MM Sundresh and Prasanna B Varale referred to the November 3 report, which documented firecrackers being openly displayed and sold in several markets, with conventional crackers allegedly being supplied on demand and products carrying questionable QR codes being passed off as green firecrackers. "In today's report on Hindustan Times there is a photograph. They say that notwithstanding yesterday's (Monday's) order, now everything is available in the (firecracker) shops. Please look into it," the bench told additional solicitor general Aishwarya Bhati, appearing for the Centre, Delhi government and the Commission for Air Quality Management. Referring to the news report's account of the availability of different varieties of firecrackers, the bench added: "They say that in the market every other cracker, licensed, unlicensed, QR code, or no QR code, everything is available. Please take a note of it." The bench asked the law officer to look into the matter and ensure that the necessary measures were taken, bringing the focus back on the enforcement machinery even as the court had relaxed its blanket prohibition on firecrackers for a limited period around Diwali....