Israel and Hezbollah accelerated their cross-border attacks overnight into Sunday with their leaders exchanging saber-rattling threats in a rapidly deteriorating situation that has the adversaries as close to full-out war as they have been in their nearly yearlong conflict.

Hezbollah has launched more than 100 rockets across a wider and deeper area of northern Israel and Hezbollah’s deputy leader Naim Kassem said Sunday that his group is now in an open-ended battle with Israel.

The death toll from a "targeted attack" by the Israeli military on a Beirut suburb Friday rose to 37, including seven women and three children, Lebanon's health minister said on Saturday, as Israel and the militant group Hezbollah continued to trade strikes. The U.S. also urged Americans in Lebanon to leave the country.