After the war it was discovered that the explosion had been an act of sabotage.

It wasn’t a mechanical failure or an act of sabotage.

He also suspects that it might have been an act of sabotage.

Was it some sort of technical malfunction or was it an act of sabotage?

This criminal hack is an act of industrial and political sabotage.

Was it some sort of technical malfunction or was it an act of sabotage?

Actual or attempted breach of security or act of sabotage

We have come to the conclusion that it was an act of sabotage.

H.M.S. Hampshire was sunk by either sabotage or due to an error of judgment on the part of her navigating officer.

We have come to the conclusion that it was an act of sabotage.

If this ship sank then that had to be due to an act of sabotage.

This team was to commit an act of sabotage in the hunters' village.

This suspected act of sabotage is still yet to be properly explained.

In both cases, it is either a matter of stupidity or a voluntary act of sabotage.

1) All attacks by air, land and lake, as well as all acts of sabotage;