Researchers at a Norwegian institute believe that there may have been two explosions, not one, at the Russian naval test site on the White Sea earlier this month, an incident that killed at least five people and raised new questions about Russia’s weapons research.

Earlier, the Russian president said Moscow was “disappointed” by the US’s recent ground-based medium-range missile testing activities, which Moscow considers a blatant violation of the Intermediate Range Nuclear Forces Treaty. Washington completed its withdrawal from the INF earlier this month.

China has issued yet another stern warning against weeks-long protests in Hong Kong, saying it will not sit idly by and watch as the unrest continues. The Chinese media, however, brushed off concerns about a possible “repeat” of the deadly Tiananmen Square crackdown 30 years ago if Beijing moves to …