When Salama Ali started investigating the disappearance of two younger brothers last year she made an awful discovery - not only were radicalised young Kenyan men leaving to join the al-Shabab militants in neighbouring Somalia, but women were being seized and trafficked by the group as sex slaves. Salama's search for information about her brothers had to be carried out quietly and confidentially, as any hint of a connection with the al-Qaeda-linked al-Shabab can arouse the suspicion of the security forces. So she met discreetly with other women in Mombasa and the surrounding area, sharing stories and seeking information about male relatives who had vanished.

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