Spain on Tuesday marked the 10th anniversary of the terrorist attacks that killed 191 people and wounded more than 1,500 others in Madrid.

King Juan Carlos, Queen Sofia, Prime Minister Mariano Rajoy and other officials attended a memorial service at the Almudena Cathedral for the victims of the commuter-train bombings.

Four Madrid commuter trains were torn apart on March 11, 2004, during the morning rush hour when backpack bombs placed aboard the trains were detonated by remote control by Islamic terrorists.

Respresentatives of associations of victims of terrorism also attended the memorial service and were greeted by members of the royal family.

"We must always be open to forgiveness, although it only becomes effective when there is sincere repentance for the crimes committed and the damage caused is repaired," Madrid Archbishop Cardinal Antonio Maria Rouco Varela told those attending the memorial service.

Representatives of other religions, including Muslims, Orthodox Christians, Episcopalians and Buddhists, attended the service, as well as ambassadors from countries that lost citizens in the terrorist attack.

Of the victims, 18 of the dead and 142 of the wounded were from Latin America.

Other events were held to mark the anniversary in Madrid, where people gathered at a memorial to the victims near the Atocha train station, the target of the terrorist attack.

Memorial services also took place across Spain, with people observing a minute of silence to honor the victims.

Fourteen of the 18 people convicted for their roles in the attacks are still in prison and two of them face sentences of more than 42,000 years even though Spanish law limits the actual time spent behind bars to a maximum of 40 years. EFE