News of Bahrain. On behalf of His Royal Highness Prince Salman bin Hamad Al Khalifa, the Crown Prince and Prime Minister, Shaikh Isa bin Salman bin Hamad Al Khalifa, Minister of the Prime Minister’s Court,. As Diwali celebrations lit up the national capital, Delhi’s air quality began to deteriorate sharply, with the AQI crossing the 400 mark in areas like Ashok Vihar.