Ecuador's president has said someone attempted to poison him by putting three highly concentrated toxic substances in gifts of chocolate and jam.

Daniel Noboa said his team had proof to support the claim, though he has yet to publicly provide any evidence.

The South American leader told CNN on Thursday that he believed it was practically impossible that the three chemicals would be found in high concentrations in the items by chance.

His comments come in the wake of violent clashes in Ecuador over a sharp rise in fuel prices under his presidency. The centre-right politician has brought in military crackdowns on drug gangs, but has also faced accusations of targeting protesters.

Noboa has denied the allegations of attempts on his life - the third in two months - were a means of portraying his detractors as violent.

No one throws a Molotov cocktail at themselves... or poisons themselves with chocolate, or throws stones at themselves, he said, referring to previous incidents.

Early in October, Ecuador's government said five people were detained over what it described as an alleged assassination attempt.

About 500 people threw rocks at the president's car and there were signs of bullet damage on his vehicle, according to the country's energy and environment minister, who added that Noboa was unharmed.

The BBC was not able to independently confirm that a bullet had been fired.

The government also said that, in late September, a humanitarian convoy containing Noboa was attacked and 17 soldiers taken hostage.

Ecuadorian officials said the convoy - which included UN and EU diplomats - was delivering aid to communities affected by a national strike when ambushed by about 350 people, who attacked it with Molotov cocktails.

Noboa posted photos of smashed windscreens and windows on the cars on social media.

A national strike protesting against the government ending diesel subsidies came to a close on Thursday after several weeks.

The strike was declared by the country's largest Indigenous organisation - the Confederation of Indigenous Nationalities of Ecuador (Conaie) - with marches and roadblocks organised.

The Conaie group led demonstrations that overthrew three presidents between 1997 and 2005.