The wildlife authorities Thursday lodged police complaints against the railways, a day after six elephants were mowed down by a speeding train. The incident happened around 5.45 p.m. Wednesday near the Nagrakata-Jaldhaka bridge in West Bengal’s Jalpaiguri district. State Forest Minister Hiten Burman and wildlife officials have alleged that the train was travelling at a speed far higher than the limit prescribed for the area, which is part of an elephant corridor. The forest and wildlife departments have also initiated a joint probe into the incident. The railway denied that the area was part of an elephant corridor. Soon after the accident, officials said as many as 15 elephants may have been injured in the accident. A team along with three trained elephants has been sent to the forest to locate the wounded animals prior to treating them for injuries. A total of 43 elephants have been killed by speeding trains in Dooars forest in recent months.