MEXICO CITY (AP) — Mexico's national transparency agency has ordered prosecutors to release 13 video recordings related to the 1994 assassination of presidential candidate Luis Donaldo Colosio.

Agency chief Blanca Ibarra Cadena says the matter is of "social and historic transcendence" and the release will shed light on the case and its investigation.

The classified videos have been requested by an unidentified private party. Prosecutors have argued it would expose lines of investigation.

The agency said Wednesday in a statement that the videos show Colosio in Tijuana on the day of his assassination, as well as what happened after he was shot.

The man convicted of the killing confessed and said he acted alone. But many Mexicans doubt the official story, believing there was a conspiracy and cover-up involving then-President Carlos Salinas' government.