Morocco arrested a Swiss national on Saturday in connection with the killing of two Scandinavian women, the counter-terrorism agency said.

Louisa Vesterager Jespersen, 24, from Denmark, and Maren Ueland, 28, from Norway were found dead early on Dec. 17 near the village of Imlil in the Atlas Mountains.

The man arrested is also suspected of “involvement in recruiting Moroccan and sub-Saharan nationals to carry out terrorist plots in Morocco against foreign targets and security forces in order to take hold of their service weapons", the Central Bureau for Judicial Investigations (BCIJ) said.

It said he also held Spanish nationality with residence in Morocco.

Nineteen other men have been arrested in connection with the case, including four main suspects who had pledged allegiance to Islamic State in a video made three days before the tourists' bodies were found.