Travel operators say young Australians remain at risk to a toxic combination of drugs and alcohol at holiday sites in Laos despite a crackdown in 2012. The crackdown at Vang Vieng, four hours north of Vientiane, comes after more than 30 travellers, including Australians, died in 2011 and 2012, after drowning or overdosing on drugs. Lao doctors at the local hospital reported high numbers of travellers needing treatment for broken bones, infected gashes or sickness as a result of alcohol intoxication and other drugs.