The announcement came just a day after Boko Haram released a new video purportedly showing some of the more than 200 girls who were seized by Boko Haram in northeastern Nigeria in April 2014.
Army spokesman Colonel Sani Usman said local journalist Ahmad Salkida had been in contact with Boko Haram, as had Ahmed Bolori and Aisha Wakil, both activists familiar with the workings of the Islamist group.
"There is no doubt that these individuals have links with Boko Haram terrorists and have contacts with them," he said.
Usman said the military would work with other security agencies to bring in the suspects if they fail to turn themselves in.
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The mass kidnapping of 276 schoolgirls from Chibok in April 2014 provoked global outrage and brought unprecedented attention to Boko Haram and its bloody quest to create a fundamentalist state in northeastern Nigeria.
A total of 218 girls are still missing.
Usman said the authorities wanted to talk to the suspects over the video released yesterday in which a masked man called on the government to free Boko Haram prisoners if it wants the girls to be rescued.
The journalist said in his personal blog he would report to the authorities as soon as he returns to Nigeria, without giving his current whereabouts.
"In the coming days I will seek to get a flight to Abuja and avail myself to the army authorities," he said.
Salkida said he had nothing to fear because he had not done anything outside the tenets of journalism.
"Clearly, my status as a Nigerian journalist who has reported extensively, painstakingly and consistently on the Boko Haram menace in the country since 2006 is an open book known to Nigerians and the international community," he said.
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