BBC News with Gaenor Howells

There has been a rare border clash between Israel and Lebanon, the worst such incident since the war between Israel and Hezbollah four years ago. The brief gun battle killed a senior Israeli army officer, at least two Lebanese soldiers and a Lebanese journalist. The United Nations Security Council has said it's deeply concerned. Barbara Plett reports.

The Security Council urged all parties to practise utmost restraint to end hostilities and to prevent further escalation. It called on both countries to respect the border and to strictly observe the terms of a UN resolution which ended the 2006 war between Israel and the Islamist Hezbollah movement. The Lebanese and Israeli armies accuse each other of violating the resolution, and their governments have lodged formal complaints here. The UN peacekeeping mission in the area says it's still investigating the circumstances that led to the clash. The acting head of the force has himself gone to the site, reflecting deep concerns that the border skirmish could trigger a wider conflict.