It is our client's contention that the fire was an accident.
我们当事人的看法是这场火灾属于意外。
《牛津词典》
2
Speculation followed that the fire was either an accident, or sabotage by people alarmed that hovering Australian navy ships might send them back to Indonesia, where they embarked.
Vessels including water taxis diverted to the scene of the accident along with fire boats and Coast Guard rescue teams but both of the aircraft sank quickly under a strong current.