The inquiry will examine if steps could have been taken to prevent the 1998 bombing.

Twenty-nine people, including a woman pregnant with twins, died after the 1998 attack.

Ex-ombudsman says parallel inquiry would be useful as victim's dad calls for Irish government meeting.

It will look at areas identified by judges relating to whether the attack could have been prevented.

An Irish government minister said there was no new evidence to merit a public inquiry in the Republic.

Relatives and survivors speak of the pain they feel, as a service is held to mark the 25th anniversary.

Survivors and the families of victims gathered in the County Tyrone town to mark the atrocity.

Two friends who were injured in the Omagh bombing describe learning that the other had survived.