After the war it was discovered that the explosion had been an act of sabotage.
The fire was believed to be an act of sabotage by workers.
Several acts of sabotage were reported Tuesday in the south.
If an act of sabotage was under way, then lives could be in danger.
I couldn't imagine how such an act of sabotage could possibly profit him.
An act of sabotage in the laboratory would have been.
Later he called the explosion "a very effective act of sabotage."
Environmental control gone down, very likely due to yet another act of sabotage.
Many other acts of sabotage would take place over the next few years.
Other acts of sabotage are taking place behind the scenes.