Mexico maternity blast death toll rises to 4

A nurse who was injured while saving several babies after a gas explosion destroyed a Mexican maternity hospital last week has died, raising the death toll to four, officials said Wednesday.
The 35-year-old nurse, Monica Orta Ramirez, died late Tuesday, five days after rescuing babies from the rubble of the Maternity and Children's Hospital in southwest Mexico City, the mayor's office said.
"Regrettably, she did not respond to all the treatments that her case needed. The exact causes (of death) have yet to be determined," the city government said in a statement.
Another nurse and two babies died last Thursday when a gas truck leak caused a huge explosion outside the hospital. More than 70 people were injured.
Nine newborns and 11 adults were still in hospitals on Tuesday.