The Chief of Defence Staff, Christopher Musa, says Finland has been encouraging a separatist, Simon Ekpa, to wreak havoc in Nigeria.
Mr Ekpa is one of the leaders of the proscribed separatist group, the Indigenous People of Biafra (IPOB).
The CDS also blamed the judiciary for partly contributing to the lingering insecurity in the country.
Mr Musa said Finland must explain why it continues to protect the separatist leader. He added that the Finland Ambassador to Nigeria should be summoned to provide clarification on the stance of the Finnish government.
