The Israeli military said on Saturday that its forces killed several Hezbollah fighters in southern Lebanon, and that an Israeli soldier was wounded, in a clash that challenges the fragile ceasefire between the two sides. The military said troops identified the fighters overnight inside a zone in southern Lebanon that Israel has declared a security zone and occupies. The fighters were struck and eliminated to remove the threat, according to the military statement. The confrontation took place on a strategic ridge in the area. The incident underscores the tense situation along the border, where a ceasefire has been in place but has come under repeated strain.