Three times a week Amsterdam - Abuja - Kano - amsterdam.
Daily amsterdam Lagos.
Crews slip in Lagos and Abuja.
If you haven't seen them doesn't mean they are not there!
However as said, suspended until 13th january.
From the KLM website:
We expect that all our flights on Friday 13 January between Amsterdam and Lagos and between Amsterdam and Abuja will be on schedule again.
Flight disruptions - KLM.com