Well over 30,000 people, mainly Syrians, have crossed into Syria from Lebanon in the past 72 hours, the UN refugee agency said on Friday, amid an escalating conflict between Israeli forces and Hezbollah that has killed hundreds of people in Lebanon.

As Israel continued its strikes in several parts of the country, more than 30,000 Lebanese and Syrians living in Lebanon set out for the Syrian border. It's an improbable turn of events, after years of Syrians fleeing into Lebanon.

Families fleeing the escalating conflict in Lebanon are pouring into Syria in growing numbers. They waited for hours in heavy traffic Wednesday to reach the relative safety of another war-torn country.