(ANSA-AFP) - WARSAW, MAR 13 - Polish President Andrzej Duda called on the United States to transfer its nuclear weapons to Poland, urging an eastward "shift of the NATO infrastructure" in an interview with the Financial Times published Thursday. Poland, a staunch ally of Ukraine, has been ramping up its defence as it aims to deter a potential threat from neighbouring Russia. "The borders of NATO moved east in 1999, so 26 years later there should also be a shift of the NATO infrastructure east. For me this is obvious," Duda was quoted as saying by the FT. "I think it's not only that the time has come, but that it would be safer if those weapons were already here," he added. In April, Duda -- a conservative ally of the right-wing Polish opposition -- said his country was ready to host NATO's nuclear arms. Moscow in response warned it would take steps to "ensure its security". (ANSA-AFP).