Venezuelan opposition leader Juan Guaidó has rejected an offer of talks from President Nicolás Maduro amid an ongoing power struggle between the two.

Mr Guaidó declared himself "acting president" on Wednesday, a move that has been recognised by several countries, including the US.

But Mr Maduro accused him of mounting a coup and cut off diplomatic ties with the US in response.

A UN Security Council meeting on the crisis is due to be held on Saturday.

President Maduro was sworn in for a second term earlier this month, after polls marred by an opposition boycott and vote-rigging claims.

However, the National Assembly argued that the post of president was vacant because the election was not fair, and that Mr Guaidó, as head of the National Assembly, should take over as acting president.

Tens of thousands have taken part in anti-Maduro protests, angry at years of economic freefall.