Nadab was the son and successor of Jeroboam, the first king of divided Israel. While engaged with all Israel in laying siege to Gibbethon, a town of southern Dan, a conspiracy broke out in his army, and he was slain by Baasha, after a reign of two years.
He did evil in the eyes of the LORD , walking in the ways of his father and in his sin, which he had caused Israel to commit. Baasha son of Ahijah of the house of Issachar plotted against him, and he struck him down at Gibbethon, a Philistine town, while Nadab and all Israel were besieging it.
(1 Kings 15:26-27)
On the heels of his assasination, came the murders of his whole house, making the entire Emphramite family extinct.
Baasha succeeded him to the throne.