1 Kings 15:27

Context15:27 Baasha son of Ahijah, from the tribe of Issachar, conspired against Nadab 1 and assassinated him in Gibbethon, which was in Philistine territory. This happened while Nadab and all the Israelite army were besieging Gibbethon.
1 Kings 16:9
Context16:9 His servant Zimri, a commander of half of his chariot force, conspired against him. While Elah was drinking heavily 2 at the house of Arza, who supervised the palace in Tirzah,
1 Kings 16:16
Context16:16 While deployed there, the army received this report: 3 “Zimri has conspired against the king and assassinated him.” 4 So all Israel made Omri, the commander of the army, king over Israel that very day in the camp.