Amine Linganzi / Liam O’Brien
Pompey have signed Liam O’Brien and Amine Linganzi on one-month contracts.
The deal for 26-year-old midfielder Linganzi is subject to international clearance.
Goalkeeper O’Brien, 24, came through the ranks at Fratton Park and was capped at England under-19 level while with the club.
He left without making a senior appearance in 2010 and went on to play for Barnet, Brentford and Dagenham, featuring 39 times for the latter.
Algeria-born Congo international Linganzi moved to England in 2010 and has featured for Blackburn, Accrington – where he was managed by Leam Richardson – and Gillingham.
He most recently appeared for French club Frejus and has turned out for the Blues in pre-season.