The dissident republican attack in 1998 devastated the Co Tyrone village, killing 29 people, including a woman pregnant with twins, and injuring hundreds of others. It came just months after the historic Belfast/Good Friday Agreement and was the greatest loss of life in a single incident in Northern Ireland’s troubled past. No-one has ever been criminally convicted of the attack.
The service took place in the town's memorial garden. Representatives from the British and Irish governments attended the service.
9. Omagh bomb 25th anniversary
People gather ahead of a service to mark the 25th anniversary of the Omagh bomb Photo: Brian Lawless
10. Omagh bomb 25th anniversary
Omagh bombing survivor Donna-Marie McGillion (right) wipes away tears Photo: Brian Lawless
11. Omagh bomb 25th anniversary
A memorial plaque at the service to mark the 25th anniversary of the Omagh bomb Photo: Brian Lawless
12. Omagh bomb 25th anniversary
People gather at today's service to mark the 25th anniversary of the Omagh bomb Photo: Brian Lawless