CRI听力:Gas Blast Shatters Mexico City Hospital, Killing 2

A gas tanker has exploded outside of a maternity and children's hospital in Mexico City, killing at least two people and leaving dozens missing.

The explosion occurred when the tanker was making a routine early morning delivery of gas to the hospital kitchen, and gas started to leak.

Much of the building has been destroyed.

Mexico City Mayor Miguel Mancera says the search and rescue work is difficult.

"We still have walls, we have metal structures that are standing, but basically there's no way to operate at this site, there's no possibility. The rescue crews are working to locate or dismiss that there are more survivors in the rubble. Approximately, 1,000 people are working manually in the rubble."

Officials initially said up to seven people had been killed.

The mayor later reduced the death toll down to two, saying a woman and baby had died.

About 100 people were believed to be inside the hospital at the time of the blast, and dozens of victims were injured by flying glass.