The explosives used in the deadly train bombings in Madrid were made only last month by a company in northern Spain, a major Spanish newspaper said on Wednesday.

The dynamite in the bombs was manufactured by the Union de Explosivos Espanoles plant at Paramo de Masa near Burgos, reported the influential El Pais, quoting Spanish investigators.

The seven copper detonators, discovered by police after the blasts in a van in the Madrid suburb of Alcala de Henares, were also made by the company.

The detonators were stolen from a granite quarry in the mountains to the north of Madrid, according to the report.

Investigators are trying to find out how the bombers managed to get these explosives.

The deadly train bombings shook Madrid on March 11, killing 201 and wounding more than 1,400 others.

(Xinhua News Agency March 17, 2004)