York City have signed Newcastle United defender Lubo Satka on loan for a month.
Slovak defender Satka, 20, made his debut for the Magpies in last season's FA Cup third-round defeat by Leicester City - his only appearance for them.
Ex-Scotland striker Derek Riordan joined on a deal to the end of the season.
Both players could feature for the Minstermen in Saturday's home fixture against Stevenage.