A young woman was killed and 57 were injured in a train collision on Mexico City's metro early on Saturday, local authorities said.<br /><br />Maintenance shortcomings were identified as one of that accident's causes.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline
