Sea Pirates: Mystery Ship of Armed Men Off the Comores Islands

Red circle is around the Comoros

Actually, the original headline is better than mine: "Interpol asked to help after arrest of ‘pirate’ ship captained by Bulgarian".

Yep.

Interpol has been asked to assist in the investigation that has followed the arrest of an alleged pirate ship crew, captained by a man reported to be a Bulgarian, off the coast of the Comores on February 18 2012, media in Mauritius said.

Security forces carried out the arrests of the 10 armed men, who said that they were Kenyan police escorting a vessel to South Africa.

However, they had no documentation to prove this and were not wearing Kenyan police uniforms, reports said.
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The presence of weapons on board the ship had raised concerns, given the history of coups in the Comoros, the report said.

I'm sure there is good explanation.

Just probably not a legal one.