Severe smog continued to choke the Indian capital of New Delhi on Sunday morning, with the Air Quality Index touching 625 and reducing visibility significantly.
Several flights to the capital have been diverted or delayed, authorities confirmed.
In fact, pollution levels in the neighbouring Noida also crossed the 600-mark, forcing authorities to shut down schools.
Meanwhile, Chief Minister Arvind Kejriwal has urged the centre to take immediate steps to provide relief to the people.

US, German scientists win Nobel medicine prize for work on light and brain
Spanish PM Sanchez calls snap election for November 29
Hundreds of French schools stay closed ahead of nationwide day of student protests
Thousands of Imran Khan supporters start march to Pakistani capital, party says
US removes bombers from UK base at centre of suspected Iranian plot