STOCKHOLM: The number of nuclear weapons in the world continue to decline, but at a slower pace than in previous years, the Stockholm International Peace Research Institute (SIPRI) said on Monday. “Over the past five years there has been a steady decline in the overall number of nuclear warheads in the world,” the think tank said in its yearly report on world nuclear forces. “The decrease is due mainly to Russia and the US, which together still account for more than 93 percent of all nuclear weapons,” it added. The number of nuclear warheads in the world has dropped by 930 from 2013 to 16,300 this year, whereas in 2011 the figure fell by 2,070 to 20,530 compared with a year earlier. The think tank warned that the decline does not imply a real commitment by the nuclear powers to give up their arsenals.