Air France plane grounded in Venezuela after French authorities receive tip off that there is a bomb on board Plane grounded after authorities told of plan to blow up plane in midair Paris-bound plane due to take off from Caracus airport on Saturday Passengers said they had cleared immigration when told flight was delayed By Becky Evans and Ap Reporter A Paris-bound Air France plane was grounded in Venezuela after a tip off by French authorities that a terrorist group might be planning to detonate a bomb in midair. More than 60 technicians, bomb experts and a canine team searched the aircraft after it was grounded at Caracas airport yesterday. The precise nature of the bomb threat was not known, but Venezuelan Interior Minister Miguel Rodriguez Torres said that French authorities passed along information from a credible source that a terrorist group is seeking to place a bomb aboard an unspecified flight from Caracas to Paris, or vice versa. A passenger stands next to Air France desk at Simon Bolivar International Airport near Caracas, Venezuela. The flight was grounded on Saturday after French authorities were tipped off about a bomb threat Venezuelan bomb experts are inspecting the plane after information that an aircraft was due to be detonated in midair 'We don't want to speculate on the motives because the information comes directly from French intelligence services,' Rodriguez Torres said, adding that the information is still being processed. In Paris, the French Interior Ministry said today that France immediately alerted authorities upon learning of a potential threat to the route, which is served only by Air France. 'It is obviously the principle of precaution,' said Interior Ministry spokesman Pierre-Henry Brandet. We cannot allow the least risk, run the least risk for passengers. He provided no details on the measures taken and refused to comment on the nature of the threat or its origin. An Air France press officer who spoke on condition of anonymity said the carrier was working 'in close collaboration' with airport and government authorities. Stranded passengers said they had cleared immigration and were preparing to board Air France flight 385 when they were told at the last minute that it was being delayed so that the Airbus A340-300 aircraft could be checked. No reason was given. Passengers said they cleared immigration when they were told the Air France flight was delayed Passengers wait on the ground front of the Air France desk. About 100 angry passengers surrounded the Air France check-in counter to protest the airline's failure to keep them informed 'We only learned reading Twitter that it could've been a bomb,' said Jesus Arandia, a 52-year-old university professor. About 100 angry passengers surrounded the Air France check-in counter to protest the airline's failure to keep them informed or provide alternative travel arrangements. Around midnight, the airport announced the flight was rescheduled for Sunday afternoon. 'They never told us anything,' said Marbella Covino, a 22-year-old student. The Air France office in Paris said passengers from the postponed flight were being put on a flight that will leave Caracas at 8pm local time. Venezuela's intelligence agency declined to comment on the threat, saying it is not authorised to discuss the case. An employee of Air France speaks with some passengers in front of the desk Security breaches have been detected before at Venezuela's main international airport. In September, several Venezuelan soldiers stationed at the airport were arrested after French authorities made their biggest cocaine bust ever, seizing 1.4 tons of narcotics that were smuggled in 31 suitcases aboard another Air France flight to Paris. France is involved with two ongoing military interventions in former African colonies, in Mali where it routed Islamic extremists from the north and in Central African Republic where French troops moved in earlier this month to help stabilize the country, disarming militia to stop sectarian violence. The U.S. has warned that Middle Eastern terror groups have tried to make inroads in Venezuela, taking advantage of political cover provided by the late President Hugo Chavez's outreach to Iran and Syria, whose governments the U.S. considers state sponsors of terrorism.