An Israeli airstrike in south Lebanon on Sunday evening killed four civilians, including a woman and three children, raising the likelihood of a dangerous new escalation in the conflict on the Lebanon-Israel border. Israeli troops and Hezbollah militants and their allies have been clashing for a month along the border since the start of the Israel-Hamas war. While clashes remain largely contained, they have increased in intensity as Israel conducts a ground incursion in Gaza against Hezbollah ally Hamas.