From UK Gov travel alerts: We advise against all travel to within 80km (50 miles) of the Colombian border in the states of Zulia, Tachira and Apure. We advise against all but essential travel to the remainder of Tachira state. Drug traffickers and illegal armed groups are active in these states and there is a risk of kidnapping. In addition, travellers should take particular care if attempting to cross in to Colombia from any state since border crossings can attract criminal activity. Travellers should only use official crossing points.
Read more: http://www.fco.gov.uk/en/travel-and-living-abroad/travel-advice-by-country/south-america/venezuela