The five carried passports of Greek men ranging in age from 23 to 33, but officials said they did not appear to be linked to any terrorist threat. "They are normal Syrians," one said.
Jhon Jairo Velázquez, a.k.a Popeye, was a top assassin for the Medellin Cartel. He claimed to have killed 300 people and helped murder another 3,000.
The trouble began in late 2012, when Venezuela began to stop paying airlines the dollars for ticket sales in bolivares.