Baasha son of Ahijah from the tribe of Issachar plotted against him, and he struck him down at Gibbethon, a Philistine town, while Nadab and all Israel were besieging it.
References for 1 Kings 15:27
Baasha killed Nadab in the third year of Asa king of Judah and succeeded him as king.
As soon as he began to reign, he killed Jeroboam’s whole family. He did not leave Jeroboam anyone that breathed, but destroyed them all, according to the word of the LORD given through his servant Ahijah the Shilonite.
References for 1 Kings 15:29
This happened because of the sins Jeroboam had committed and had caused Israel to commit, and because he aroused the anger of the LORD, the God of Israel.
References for 1 Kings 15:30
As for the other events of Nadab’s reign, and all he did, are they not written in the book of the annals of the kings of Israel?
References for 1 Kings 15:31