BERLIN (AP) — German authorities have arrested two suspected members of the Somali-based extremist group al-Shabab after they landed at Frankfurt airport Saturday.

The federal prosecutors' office said in a statement Sunday that the men were detained in Kenya last month and deported to Germany.

Both are alleged to have gone to Somalia in 2012 and taken part in al-Shabab operations.

The men were identified as 30-year-old German-Tunisian dual citizen Mounir T. and 22-year-old German citizen Abdiwahid W. Their full surnames weren't released in keeping with German privacy laws.

Earlier this month, German authorities arrested three other Germans also suspected of being al-Shabab members.