Paul Parry and Martyn margetson have been called in for the match against Slovenia in Swansea on Wednesday.
For the U21's City already had Byron Anthony and Stuart Fleetwood in the squad and they were joined at the end of last week by left back oe Jacobsen. Now the young strike duo of Jamal Easter and Curtis McDonald have been called up as well. They play Malta in Llanelli on Tuesday.
Phil Muryne and Jeff Whitley are in the Northern Ireland squad for their friendly on Wednesday.