A Croat on this very forum admitted that the Mostar bridge was was blown up by the Croats, and said they would do it again if the muslims kept up their shenanigans.
I know that Wiki isn't the best of sources, but they mention some flap about the Muslims having blown it up themselves, even though the Croats admitted they blew it up.
The Old Bridge stood for 427 years, until it was destroyed on 9 November 1993 during the War in Bosnia and Herzegovina. After its destruction a temporary cable bridge was erected in its place. Responsibility for the destruction of the bridge is attributed to Bosnian Croat artillery fire.[1][2][3] After the destruction of the Stari Most, a spokesman for the Bosnian Croats admitted that they deliberately destroyed it, claiming that it was of strategic importance.[4] The Croatian Defence Council, which had previously tried to protect the bridge from Bosnian Serb shells, bombarded the bridge from 8 November.[4] However, a book written by three Zagreb-based engineers, one of whom testified at the trial, claims that the Croatian Defence Council were not responsible for the destruction of the bridge but that it was instead destroyed by a mine activated from Bosniak territory.[5] An expert from Germany considers conclusions of this analysis to be technically correct. [6]
Slobodan Praljak, the commander of the Croatian Defence Council, is currently on trial at the ICTY with the prosecution alleging that he ordered the destruction of the bridge, among other charges.[7][8] Presiding judge at the trial, Jean-Claude Antonetti, recently said during the trial, that it is not proven that the forces of the Croatian Defence Council destroyed the Stari Most, nor it is proven who and how ordered the destruction.[9]
So a question that we thought was answered long ago may still be unanswered. It was either the Croats or the Bosnian Muslims.