India, Dec. 16 -- LUCKNOW Dense fog and poor visibility wreaked havoc across Uttar Pradesh, triggering a series of road accidents on Tuesday that left at least 26 people dead and dozens injured in eight districts. The worst tragedy unfolded in Mathura, where a massive pile-up on the Yamuna Expressway claimed 13 lives, most of them charred to death after vehicles caught fire.

Eight buses and three smaller vehicles collided with each other at the 127 km milestone on the Yamuna Expressway near Baldev town in Mathura around 4.30am. The vehicles were travelling from Agra towards Gautam Buddha Nagar when visibility dropped sharply due to dense fog, said officials.

SSP (Mathura) Shlok Kumar said the accident occurred when drivers failed to see...