An armed robbery of an 18-wheeler truck transporting bars of gold from Florida to Massachusetts was most likely an inside job , according to police . The $ 4.8 million gold heist by three armed robbers unfolded after one of the two armed guards said that he felt sick and prompted the driver to pull over . But Wilson County Sheriff Calvin Woodard Jr. said Wednesday that different stories have emerged about the trip from Bridgewater , Massachusetts on I-95 . Scroll down for video . Investigation : Wilson County Sheriff Calvin Woodard Jr , pictured , said that differing stories from the guards about the armed robbery had led to suspicions over their accounts of heist . Suspects : Woodard shared sketches of the suspects thought to be male and possibly Hispanic who allegedly bound the hands of the driver and the passenger - there are three suspects altogether . White van : Two security guards working for Transvalue Inc of Miami were reportedly approached by three armed men driving a white van , pictured here , after pulling over on the interstate . In the latest account of events , one of the two armed guards said that he felt sick and this is why the driver pulled over . However , in an earlier description the guards , employed by Miami-based company , TransValue Inc. said a mechanical issue had caused the driver to stop . The guards said that after the vehicle stopped they were approached by three armed men driving a white van who ordered them to lie on the ground . They then tied their hands behind their backs and marched them into nearby woods before taking 275lbs of gold . Woodward told reporters that these differing accounts have led to further investigations . 'There is suspicion at this time that this could be an inside job due to the circumstances of the robbery , ' a Wilson County Sheriff 's Office detective wrote in a search warrant obtained by ABC . 'The fact that the truck was robbed immediately upon it pulling over at an unannounced stop is suspicious in and of itself , ' the document added . Search : Armed robbers are suspected of stealing $ 4million in gold from an 18-wheeler taking the precious from Florida to Massachusetts on Interstate 95 . Above , deputies investigate a wooded area near the road . Location : The men 'ordered the guards to lie on the ground , tied their hands behind their backs and marched them into nearby woods , before taking 275lbs gold ' Cone : This photo is of a traffic cone that was positioned behind the truck as suspects allegedly removed gold from the vehicle after breaking a lock on the back . 'It is also suspicious because there are no markings on the side of the truck that would indicate the type of cargo contained therein . 'The suspects also went directly to the trailer and found the gold which was in unmarked five gallon buckets . It is not believed that this is a random act due to the nature and facts of this robbery . ' Police are now seeking a search warrant for the phones of the armed guard who felt sick because of the suspicious nature of the case . Woodard shared sketches of the three suspects who allegedly bound the hands of the driver and the passenger . Meanwhile , a photo was shown of a traffic cone that was positioned behind the truck as suspects allegedly removed gold from the vehicle after breaking a lock on the back . The traffic cone had the marking of a company that only does work in Florida , according to ABC . Woodard said the driver and the passenger , who speak little English , are not suspects , but both men have been interviewed separately several times by police . He added that the driver and the passenger did violate their company ’ s policies by exiting the vehicle without their firearms and leaving the firearms inside the truck . Wilson County Sheriff 's Deputies investigate an area near Interstate 95 in Wilson , North Carolina , on Monday . Investigation : The Federal Bureau of Investigation has joined in the search for the robbers , thought to be male and possibly Hispanic . Neither of the guards was injured during the 'very rare incident ' , TransValue said . A reported 275lbs of gold were stolen and silver was also being carried in the truck , which was stopped near mile marker 114 on the highway . Locks on the back of the truck were sawed off , according to WITN . The Federal Bureau of Investigation has joined in the search for the robbers , thought to be male and possibly Hispanic . A reported 275lbs of gold were stolen , though it is not known which form the truck 's precious metal took ( file photo ) The metal was owned by Republic Metals Corporation in Opalocka , Florida , according to a search warrant . TransValue , which specializes in transporting valuable goods and money between financial centers , keeps goods they move insured for up to $ 100million . A $ 50,000 reward is on offer for information leading to an arrest . Shortly after the heist confused drivers told 911 dispatchers that they saw uniformed drivers run into the North Carolina highway with their hands bound , motioning for help , according to recordings .
Investigators say there are different accounts about the heist . They are examining evidence about why the driver pulled over . Metal was en route from Miami to Massachusetts when truck stopped . three armed men in white van tied guards and marched them into woods . Owner of transport company TransValue says his guards were n't injured . Goods transported with company are insured for up to $ 100million .