Jon Harley heads the list of Pompey players who have today been told their contracts will not be renewed.
The News understands Brian Howard, Lee Williamson and Mustapha Dumbuya are also the victims of cost-cutting measures at the Blues.
The move comes during a raft of financial cutbacks delivered by administrator Trevor Birch in the past week.
Pompey have already served one-month’s notice of leaving their Eastleigh training base.
In the meantime, Harley, Williamson, Howard and Dumbuya have been given seven days’ notice their existing contracts will not be renewed.
Howard and Williamson are understood to be the highest-earning players currently on the Blues’ books.