When the Israelites along the valley and those across the Jordan saw that the Israelite army had fled and that Saul and his sons had died, they abandoned their towns and fled. And the Philistines came and occupied them.
NIV
And when the men of Israel on the other side of the valley and beyond the Jordan saw that the Israelites had fled and that Saul and his sons were dead, they forsook the cities and fled; and the Philistines came and dwelt in them.
AMP
And when the men of Israel that were on the other side of the valley, and they that were on the other side Jordan, saw that the men of Israel fled, and that Saul and his sons were dead, they forsook the cities, and fled; and the Philistines came and dwelt in them.
KJV