President Ma Ying-jeou said Saturday that he will respect any decision made by the Ministry of Justice on the execution of death row inmates. He, however, also said that no decision has been made so far. The president was responding to a question from reporters about concerns that executions might affect Taiwan's bid to have its citizens included in Europe's Schengen visa-waiver program. Taiwan executed four death row inmates on April 30 -- the nation's first executions since December 2005 -- drawing condemnation from the European Union. On Friday, the Constitutional Court rejected a petition filed by an anti-death penalty group for a constitutional interpretation on the legality of the death penalty. The ruling was seen as clearing the way for the execution of the 40 inmates who remain on death row. Justice Minister Tseng Yung-fu said Friday that there is no timetable for the execution of the convicts. 