"Any sign that she'll abandon him triggers violence," she said.

The pollsters warned that unregistered voters might even trigger violence.

"The proposed map triggered idle violence," a Western diplomat said here today.

"Then what could have triggered such violence among the Vulcans?"

Political groups have opposed elections, saying that balloting will trigger widespread violence if it is held.

This did not trigger additional violence, but there were signs of turmoil in the country, according to the advocacy group swisspeace.

Wins or losses in sporting events can also trigger violence.

Nowadays, many people are facing psychological problems which sometimes trigger violence.

There is no particular temperature that triggers violence, he says.

Society is largely harmonious, although social, religious and ethnic tensions have triggered horrendous violence.