Has Venezuela been ditched by its strongest allies - Russia and China?

Venezuelan President Nicolás Maduro could be forgiven for wondering who his true friends are.

Once rock solid, his reliance on his two main allies - China and Russia - now appears increasingly uncertain.

For years, both countries supported Venezuela's socialist-led government politically, financially and militarily - a relationship that began under former President Hugo Chávez, Maduro's mentor and predecessor.

But experts say that backing now seems to be largely symbolic, with statements being given in support rather than concrete military or financial aid.

This shift comes as the US has deployed air and naval forces - including a nuclear-powered submarine, spy planes and 15,000 troops - to the Caribbean.