Israel's Amb. to the U.S.: Hamas is behind this "heinous act"

Violence in the Middle East is escalating as Israel and Hamas are trading threats and warnings following the murder of three Israeli teens.

Thousands of Israelis gathered Tuesday to mourn the three teens who were kidnapped two weeks ago on their way home from school in the West Bank.

Israel's Netanyahu says of slain teens: 'May God avenge their blood'

Israel says Hamas is responsible for their deaths - a claim Hamas denies.

Overnight, Israel stepped up its strikes against Hamas terror sites in Gaza, hitting 34 targets. Those strikes were in response to the 18 rockets fired into Israel from Gaza since Sunday.

OutFront, Israel's Ambassador to the United States Ron Dermer.