Grant Hanley is due on Tyneside for a medical after Newcastle United agreed a fee for the defender.
Blackburn Rovers are understood to have accepted bid for Hanley.
And the 24-year-old is set to travel across the Pennines to complete a move to St James's Park.
Sky Sports report that Blackburn have accepted a £5.5million bid for Hanley, who is keen to join Newcastle and become the club's sixth summer signing.
United manager Rafa Benitez admitted the need for defensive recruits after Saturday's 6-0 win over Bohemian in Dublin.
Benitez said: “We are short of centre-backs. We have to manage the minutes and positions. It’s clear that we need bodies in some positions, and I think we will have someone soon.”
Norwich City had also been interested in Hanley.