David Cameron has condemned the killing of three Israeli teenagers as a "appalling and inexcusable act of terror".
The bodies of Naftali Frenkel and Gilad Shaar, both aged 16, and 19-year-old Eyal Yifrach, were discovered near the village of Halhul in the West Bank close to the place where they were last seen alive earlier this month.
Israel has accused Hamas of abducting the youths as they were hitchhiking home - a claim the Palestinian militant group has repeatedly denied.
Their disappearance on June 12 triggered a massive Israeli search operation in Palestinian towns and cities.
In a statement, Mr Cameron said he was "deeply saddened" by what had happend to the teenagers.
"This was an appalling and inexcusable act of terror perpetrated against young teenagers. Britain will stand with Israel as it seeks to bring to justice those responsible," he said.
"Tonight my thoughts and prayers are with the families of Gilad, Naftali and Eyal. No parent should have ever to suffer such heartache or grief."