1.   It is vital that leaking gas pipes are fixed immediately.

2.   Flames melted a lead pipe and ignited leaking gas causing the fire to spread along the passageway and up the stairwell to the second floor.

3.   From the window behind her wafts the distinctive odor of leaking gas.

4.   If you hear, see or smell leaking gas, immediately get everyone away from the cylinder and call the fire department.

5.   Nobody knew what exactly had exploded or how many people were in the buildings exposed to leaking gas.

6.   The attention of firefighters shifted to preventing the outbreak of new fires around the innumerable leaking gas lines that remained in the hardest hit areas.

7.   A leaking gas line exploded during morning rush hour Friday, crushing vehicles and tossing heavy metal plates from a temporary road into the air like dominoes.

8.   A leaking gas line explodes during morning rush hour, crushing vehicles and tossing heavy metal plates from a temporary road into the air like dominoes.

9.   A leaking gas line exploded during morning rush hour Friday, crushing vehicles and tossing heavy metal road covers into the air like dominoes.

10.   A leaking gas line explodes during morning rush hour today, flattening vehicles and tossing heavy metal plates from a temporary road into the air like dominoes.