The family of a missing high school student who may have been the first victim of a suspected serial killer in Mexico City have protested at the site where bones were found last week.

The bones were discovered with the belongings of at least six women, police said, and Amairany Roblero's relatives have been told that evidence was found relating to her 2012 disappearance. Ms Roblero was 18 when she vanished and, as is often the case in Mexico, her family was left to investigate her disappearance with little help from prosecutors.

Family friend Alejandra Jimenez said: "The prosecutors had the case file but they didn't ever give any results to her parents." Instead, her parents printed flyers and gave them out near her school - the last place she was seen - but they had "nothing, nowhere to start, nor any directions to the end.