YEREVAN — Secretary of State Hillary Rodham Clinton says she is very concerned about instability in the Nagorno-Karabakh region disputed by Armenia and Azerbaijan.

Clinton says the death of young soldiers and innocent civilians is “senseless” and that force cannot resolve the two-decade conflict.

She spoke Monday from Armenia’s capital after three Armenian soldiers were killed and five wounded after clashing with Azeri forces near the border. It wasn’t clear if there were Azeri casualties.

Clinton warned that Armenia-Azerbaijan tensions have the capacity to escalate into a much broader conflict that would be tragic for all concerned.

She said the U.S. would continue working with France, Russia and others on mediation efforts.