At that time, a Prison Service spokesman said no Semtex was found during the operation.

BBC: Bomb parts found in jail search

In the past, money raised in America and elsewhere has ended up buying bullets and semtex.

BBC: Trimble praises Omagh families' protest

Libya, which had provided the IRA with tonnes of weapons, including the military explosive Semtex, also withdrew its support.

BBC: Enniskillen survivors plea to McGuinness over attack