Photos: Explosion at Mexico City hospital

Rescue workers comb through the rubble of a children’s hospital after a gas truck exploded on the outskirts of Mexico City.  (Rebecca Blackwell / Associated Press)

Rescuers work amid the wreckage caused by an explosion in a hospital in Cuajimalpa, Mexico City.  (DAVID DEOLARTE / AFP/Getty Images)

Police climb over a wall as they work to cordon off an area where rescue workers combed through the rubble of a children’s hospital after a gas truck exploded.  (Rebecca Blackwell / Associated Press)

Rescuers work amid the wreckage caused by an explosion in a hospital in Cuajimalpa, Mexico City.  (RONALDO SCHEMIDT / AFP/Getty Images)

Relatives and friends wait outside the police cordon where a gas truck exploded at a maternity and children’s hospital in Cuajimalpa, a Mexico City borough.  (Rebecca Blackwell / Associated Press)

Rescuers work amid the wreckage caused by a Jan. 29 explosion at a hospital in Mexico City.  (David Deolarte / AFP/Getty Images)

Authorities and rescue workers comb through the rubble after a gas explosion ripped through a maternity and children’s hospital in Mexico City on Jan. 29.  (David Deolarte / AFP/Getty Images)

Emergency workers use a dog to hunt through the rubble after an explosion in a hospital in Mexico City on Jan. 29.  (David Deolarte / AFP/Getty Images)

Rescue crews and volunteers work amid the wreckage caused by a Jan. 29 gas explosion at a hospital in Mexico City.  (David Deolarte / AFP/Getty Images)

A woman lies on a stretcher after suffering injuries in an explosion at a hospital in Mexico City on Jan. 29.  (David Deolarte / AFP/Getty Images)

Emergency workers and volunteers take part in rescue efforts after a gas explosion ripped through a hospital in Mexico City on Jan. 29.  (David Deolarte / AFP/Getty Images)