The number of people arrested in Denmark and Germany over an alleged terror attack plot rose to 14 on Friday with six more people placed in pre-trial detention. All but one of the suspects were arrested in Denmark. Three of them were Syrian nationals, aged 33, 36 and 40, who were arrested last weekend. Authorities in Germany and Denmark initially on Thursday announced eight arrests, and on Friday, another six people were held, police said. All the detention hearings in Denmark were held behind so-called double closed doors, meaning the case is shrouded in secrecy and few details are made public. The Danish Security and Intelligence Service, known by its acronym PET, said Thursday that the people arrested in Denmark were suspected “of having acquired ingredients and components for the manufacture of explosives, as well as weapons, or having participated in this.” The persons identities and other nationalities were not made public. Earlier, German authorities had announced the first three arrests — two in Denmark and one in Germany. They said the suspects were alleged to have purchased several kilograms of chemicals in January that could be used to manufacture explosives. A search of a residence in the city of Dessau-Rosslau, between Naumburg and Berlin, turned up 10 kilograms of black powder, and fuses, the German prosecutor said. More chemicals were seized in Denmark. PET said those arrested in Denmark are suspected of “having planned one or more terrorist attacks or participated in attempted terrorism." It did not say where such an attack would take place. Danish media said that several women were among the detainees.