Frankfurt, March 26 Amazon is preparing to launch a two-hour delivery service in Berlin, German newspaper Welt reported today, citing Berlin transport sources. The newspaper said Amazon had ordered a site on Berlin’s fashionable Kurfuerstendamm to be repurposed as a warehouse for over 10,000 articles from online retailer’s assortment. Until now, Amazon has mostly used Deutsche Post’s DHL parcel service for deliveries in Germany, and its move to build up its own delivery capabilities is seen as a threat to DHL’s business. Deliveries would start in May and would at first be carried out by courier firms already active in the German capital, taking place six days a week in two shifts, Welt said. The newspaper quoted an Amazon spokesman, when asked about the report, as saying: “We have no announcement about this at the moment.”