Minister of State for Railways Manoj Sinha on Friday said that the question of structural weakness of the foot overbridge connecting the Parel-Elphinstone Road stations in Mumbai does not arise as the deaths occurred due to a stampede."The incident has occurred due to stampede. So I don't think that any question over the foot overbridge's strength arises."A large number of people in Mumbai commute daily. The railway has already been undertaking task of strengthening the overbridges in a serial wise manner. And we are trying to strengthen all the bridges one after the other," he said here.At least 22 commuters were killed and many more injured in a stampede on a narrow railway foot overbridge connecting the two stations in Mumbai on Friday morning.