Russia, Iran and China are behind a growing number of life-threatening operations in Britain including attacks and kidnappings, often deploying criminals and sometimes children as proxies, two senior British police officers said on Tuesday.

The summit highlights Tehran's growing relationship with Beijing — and Moscow — following its recent conflict with Israel, which was joined by the United States in attacking Iranian nuclear sites. China's support provides Iran with crucial economic and military backing that stands to weaken U.S.-led sanctions and containment efforts.

Angela Stent, senior fellow at Brookings Institution, says Russian President Vladimir Putin counted on Chinese President Xi Jinping's support when he invaded Ukraine – and continues to count on Beijing's economic support and diplomatic support on a global stage.

China believes that the United States' tightening of anti-Russian sanctions does not contribute to the resolution of the “Ukrainian conflict,” which can only be achieved through dialogue and negotiations.

NATO Secretary General Mark Rutte warned that Brazil, China and India will face secondary sanctions from the US if Russia doesn’t negotiate a peace deal with Ukraine, and said they should lean on President Vladimir Putin to agree to a ceasefire.

Foreign Minister Abbas Araghchi seized the opportunity at the Shanghai Cooperation Organisation summit in China to denounce Israeli and US attacks on Iran, rally diplomatic support against sanctions and warn of regional instability should the fragile ceasefire collapse.

In May EU leaders said they were ready to “work hand in hand” with China to deal with “common challenges”. But the Europeans’ short-lived friendliness was as much an attempt to manipulate the Americans as it was an attempt to woo the Chinese,

The U.S. senator said China would feel the heat of his proposal as President Trump's attitude toward Russia hardens.