2 sentences

1. 电线短路导致这栋老房子走火了。

   diàn​xiàn duǎn​lù dǎo​zhì zhè dòng lǎo fáng​zi zǒu​huǒ le.

   A short circuit caused the old house to catch fire.

   Source: Dong Chinese Dictionary

2. 他在擦枪的时候，手枪不小心走火了。

   tā zài cā qiāng de shí​hou, shǒu​qiāng bù xiǎo​xīn zǒu​huǒ le.

   While he was cleaning the gun, it accidentally went off.

   Source: Dong Chinese Dictionary