LAGOS, Nigeria — A video posted online Monday apparently shows seven French hostages kidnapped from northern Cameroon, with a masked militant claiming that the radical Islamic group Boko Haram from neighboring Nigeria holds them.

The video, posted to YouTube and mentioned on a jihadist website, shows one of two French men reading a statement, with a woman in between them. Four children sit on the ground near them, flanked by two masked militants wearing camouflage uniforms and holding rifles.