ball of flame go up when I was at the red light , just went up in flame , '' said witness Mary Greib . `` I took off running . '' Said another witness , who did not want to be identified : `` We had a woman in a light-colored , midsized vehicle of some sort that was hesitant to pass the tanker . A number of vehicles were attempting to go around her in different directions . '' He said he was one of them , and passed her on the right , after which the explosion occurred . `` We are not sure what happened , '' he said . Vince Brennan said he was on the eighth floor of a nearby building when he heard the explosion coming from where `` a vicious curve '' exists on the highway . `` I heard a whole bunch of boom , boom , boom , '' he said . He ran to the window and looked down on a McDonald 's restaurant . `` You could n't even see it , it was so black with smoke , '' he said . `` The flames had to
-LRB- CNN -RRB- -- A collision involving two big-rigs and a car Wednesday caused an explosion that sent flames and clouds of smoke billowing and collapsed a highway overpass just north of Detroit , Michigan . Fire rages at the site of a tanker crash and overpass collapse on I-75 north of Detroit , Michigan , Wednesday . One of the tankers was traveling on the Interstate 75 about 8:30 p.m. in Hazel Park , near the Nine-Mile overpass , when the collision caused an explosion , said Lt. Shannon Simms of the Michigan State Police . It was headed northbound , said Bill Shreck of the Department of Transportation . Hazel Park is about 10 miles north of downtown Detroit . The explosion erupted upward , causing the overpass , carrying two lanes in each direction , to collapse , Simms said . Watch footage of fire '' Firefighters put out the blaze late Wednesday and were able to locate all three drivers of the vehicles involved in the crash . The three suffered minor injuries . One of the tankers was filled with thousands of gallons of fuel , Simms said . `` I just saw a huge