A furious Mamata Banerjee left her Kolkata office this evening after 30 hours amid a row over the presence of army at toll booths across West Bengal. "The centre is trying to bulldoze us, we will fight them legally," Ms Banerjee said. The centre and the army have said soldiers are present at the toll booths as part of a routine vehicle counting exercise and have refuted the West Bengal Chief Minister's allegation that her government was not informed.