Three people have been taken into custody in connection with the blast . Journalists James Fredrick and Sheila A. Sanchez Fermin and A man injured in the blast has died , bringing the total number of fatalities to five . Mexico City 's mayor said a gas leak was reported , then there was an explosion .
Three people have been taken into custody in connection with the blast . A man injured in the blast has died , bringing the total number of fatalities to five . Mexico City 's mayor said a gas leak was reported , then there was an explosion .