New Delhi, May 21 -- A three-day transport strike has begun across Delhi-NCR and is expected to affect the movement of taxis, auto-rickshaws and commercial goods vehicles.

The 'Chaalak Shakti Union', in coordination with other organisations of Delhi, has called for a Chakka Jam (strike) and appealed not to operate vehicles on May 21, 22 and 23.

"Due to the continuously increasing prices of CNG, petrol and diesel, middle-class drivers are struggling to support their families," the All India Motor Transport Congress said in a letter to Delhi Lieutenant Governor Taranjit Singh Sandhu and Chief Minister Rekha Gupta.

The petrol price in New Delhi rose to Rs.98.64 per litre from Rs.97.77 on Tuesday, while the rate of diesel increased to Rs.9...