Diwali, the festival of lights, is being celebrated across the city with traditional fervour as people decorated and illuminated their houses.
People clad in new attire, thronged temples and distributed sweets and savouries among friends and relatives.
The people, especially kids and youth, enjoyed the day by bursting crackers.
President Pratibha Patil, Prime Minister Manmohan Singh and Union Ministers also celebrated Diwali.
In the national capital, all small and major markets brimmed with activity as shoppers were seen making last minute purchases for the festival which marks the return of Lord Rama to his kingdom after 14 years of exile.
With the September 13 serial blasts that rocked the main markets in the capital still fresh in the minds of Delhiites, police have been beefed up security in prominent markets.
The Delhi Police had deployed more than 3,400 personnel across the capital to maintain a strict vigil in crowded places like markets and other vital installations.
On its part, the fire department has deployed more than 100 fire tenders at various strategic locations across the capital.