CNN  —  A fifth foreign tourist has died in a widening tragedy linked to suspected methanol poisonings in Laos, as a growing list of countries warned of the potentially fatal consequences of drinking tainted alcohol in the Southeast Asian country. United Kingdom authorities told CNN on Thursday that a British woman had died in Laos, without naming her or the circumstances of her death, after reports emerged of a spate of fatal suspected poisonings of foreigners in Vang Vieng, a popular