![The video released in January in which the men appear.](https://imagenes.elpais.com/resizer/v2/https%3A%2F%2Fep01.epimg.net%2Fpolitica%2Fvideos%2F2015%2F07%2F06%2Factualidad%2F1436194581_129462_13879500_fotograma_2.jpg?auth=4afc7f164cc2c14cf9c7abeff6cea05ee5d295a9dddf3ebb4162b8bb90399551&width=414&height=233&smart=true)
Two Spaniards arrested on return from fighting ISIS in Syria
The men both belong to communist organizations In a video, they said they were battling against the “fascist beast”
The men both belong to communist organizations In a video, they said they were battling against the “fascist beast”
At least two young men are known to have joined Kurdish militias battling the extremists