Burnley striker Jonathan Walters has suffered a new knee injury.
Walters, 33, is on the casualty list at Burnley with recurring knee trouble and no date has been set for his return.
Burnley boss Sean Dyche is unsure when Walters will be able to return to training, which is grim news for Ireland — Martin O'Neill names his squad for the must-win Group D games against Moldova and Wales next Tuesday.
"Jon has got to let his knee settle down a little bit, his knee flared up a bit so we're not sure of the timescales with that," said Dyche on Thursday.