In pictures: Chinese gas blast

1 of 7 A gas well in Chongqing, in south-western China, was still burning three days after Tuesday's huge explosion.

2 of 7 The blast released poisonous gases, injuring thousands of residents.

3 of 7 The leak turned an area of 25 sq. kms into a death zone - at least 191 were killed.

4 of 7 The bodies of people and farm animals were left strewn along roads.

5 of 7 The victims - including many children - suffered from acid burns.

6 of 7 Many are being treated in local hospitals after inhaling toxic fumes.

7 of 7 Tens of thousands have been evacuated from a radius of five kilometres (three miles) of the explosion.