A woman allegedly killed her five-daughters before committing suicide in Chohatan area in Rajasthan's Barmer on Wednesday, police said. According-to-police, Vanu Devi pushed Santosh, Mamta, Naina, Hamsa and Hemlata into a-water-tank before jumping into it herself. Senior-police-officers have reached the spot and efforts are being made to fish-out the bodies, police said, adding that the reason behind the extreme-step is yet to be ascertained.