US accuses China of ‘massively’ expanding nuclear arsenal amid fears of new arms race

China has opposed the ‘smearing of its nuclear policy’ while insisting Beijing would not ‘engage in any nuclear arms race’The US has accused China of dramatically expanding its nuclear arsenal, while doubling down on claims that Beijing had conducted secret nuclear tests.Washington said the – the last treaty between top nuclear powers the US and Russia – earlier this month presented the possibility of striking a “better agreement” that included Beijing.