Winger moves to fellow League Two side
Kal Naismith has joined Hartlepool on an emergency loan deal until January 3.
The summer signing from Accrington has made six appearances for Pompey this season after recovering from a thigh injury.
Blues boss Paul Cook said: “He’s going up there to get his match fitness so he can come back and show us what a player he is.”
Hartlepool currently sit 19th in the League Two table ahead of Sunday’s televised clash with Leyton Orient.