In his status update, David Jose Duaigues Marti called the Royal family "criminals" and urged the ETA, or Euskadi Ta Askatasuna, to bomb the royal palace, ThinkSpain reported Friday.
"If only ETA would bomb them a bit more, the gang of idiots. Long live ETA and terrorism," he wrote.
Prosecutor Fernando Burgos said the Facebook post was considered "incitement to violence" and "exaltation of terrorism," which are both punishable with jail time in Spain.
2014: The Year in Music [PHOTOS]