Eight countries have been added to a UK Foreign Office list warning of the risks of methanol poisoning from counterfeit or tainted alcoholic drinks.
Ecuador, Japan, Kenya, Mexico, Nigeria, Peru, Russia and Uganda are included in the updated travel guidance following incidents involving Britons in those countries.
The advice previously covered Thailand, Laos and Vietnam, Cambodia, Indonesia, Turkey, Costa Rica and Fiji and follows a number of high-profile incidents including the death of six tourists in Laos last year.
Travellers are advised to watch out for signs of methanol poisoning such as blurry vision and confusion, which can lead to serious illness and death.
Methanol is an industrial chemical found in antifreeze and windscreen washer fluid. It is not meant for human consumption and is highly toxic.
