Spain is evacuating its aid workers from western Algeria after a tip off about possible terrorist attacks.
An air force plane has been sent to bring home workers from refugee camps in Tindouf.
Officials say they are worried that a rebellion in northern Mali earlier this year may now spread to its neighbour.
Three other foreign nationals are also being evacuated.
Earlier this month, three European aid workers seized from a refugee camp in Algeria were freed after being abducted last October.