The sudden spike in the city’s air quality began over the weekend, when the AQI jumped from 172 on Friday to 246 on Saturday, plunging the city into 'poor' air quality.
According to preliminary probe, poor visibility due to dense fog & overspeeding may have led to the accident, following which the car crossed a drain and fell into the pit, police said.
The system was to delivered in March but will now reach the Indian shores by May, or June. The fifth S-400 will be delivered in the last quarter of this year.
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