ROME (Reuters) - International hostages kidnapped last month by a Nigerian Islamist group have been killed, the Italian Foreign Ministry said on Sunday.

"Our checks conducted in co-ordination with the other countries concerned lead us to believe that the news of the killing of the hostages seized last month is true," a Foreign Ministry statement said.

A Nigerian Islamist group said on Saturday it had killed the seven foreign hostages seized last month.

(Reporting by Gavin Jones; Editing by Alison Williams)

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