It's thought a gas leak may have caused the blast.

人们认为可能是煤气泄漏引起了爆炸。

《柯林斯英汉双解大词典》

If you suspect a gas leak, do not strike a match or even turn on an electric light.

假如你怀疑有煤气泄漏，不要划火柴，甚至连电灯都不要开。

《牛津词典》

The neighbors came out of their houses to see if we had a gas leak.

邻居们从他们的房子里出来看看我们是否出现了煤气泄漏。

youdao

One hundred sixty-seven men were killed when the structure exploded after a gas leak.

VOA: special.2009.03.22

Satinath Sarangi, a prominent activist working with the victims of the gas leak, says the fight could be led by the generation born in the aftermath of the disaster.

VOA: standard.2010.06.10

Facing a barrage of criticism for failing to get adequate justice for the tens of thousands of victims of the Bhopal gas leak, the government has said it needs to revisit laws pertaining to the kind of industrial disaster witnessed in Bhopal.

VOA: standard.2010.06.10

The plant has been shut since last week following complaints of a gas leak.

BBC: Sterlite Industries plant

Dozens of homes were evacuated and trains cancelled because of a gas leak in Portsmouth.

BBC: Trains cancelled after Portsmouth gas leak

In 1984, a gas leak at the Union Carbide pesticide plant near Bhopal, India, killed nearly 4, 500 people.

CNN: Tuesday,