The horrific three-train accident in Odisha's Balasore district has snowballed into a political slugfest, after Mamata Banerjee and railway minister Ashwini Vaishnaw on Saturday engaged in a verbal duel over the death toll, with the Trinamool Congress accusing the Centre of neglecting passenger safety, while the Bharatiya Janata Party calling the West Bengal chief minister “motor-mouth”.