2 Kings 12:20

Now it happened as soon as the kingdom was strong in his hand, that he struck down his servants who had struck down the king his father.

Then the servants of Amon conspired against him and put the king to death in his own house.

When they had gone from him (for they left him very sick), his servants conspired against him because of the blood of the son of Jehoiada the priest, and killed him on his bed. So he died, and they buried him in the city of David, but they did not bury him in the tombs of the kings.