Vehicle flips, 7 die near Bronx Zoo April 29, 2012 -- Updated 1926 GMT (0326 HKT) NEW: The vehicle plummeted about 100 feet, authorities say The vehicle landed in part of the Bronx Zoo, a zoo official says New York (CNN) -- Seven people, including three children, died Sunday when a vehicle flipped over a guardrail and plunged 100 feet to the ground, landing upside down in an area of the Bronx Zoo that is closed to the public, officials said. The victims include an 84-year-old man; three women, ages 80, 45 and 30; two girls, ages 12 and 10; and a smaller girl whose age was unclear, the New York Fire Department said. A baby bag with diapers inside was found at the scene. The vehicle was traveling at a high rate of speed, said FDNY Deputy Chief Ronald Werner. Authorities believe it struck something before going over the railing. It flew about 75 or 80 feet before plummeting roughly 100 feet to the ground, Werner said. No animals, exhibits or visitors were affected. ... The area where the vehicle fell is adjacent to where the zoo's trams are parked, Werner said. The fire department's Howard Sickles told reporters that in his 20 years he's "seen a lot of horrific things and this is one of them." The crushed vehicle came to rest in overgrown brush, Werner said. Authorities used thermal imaging cameras to find victims in case any had been ejected, he said. Authorities received multiple calls about the incident at about 12:30 p.m., Werner said. The vehicle was heading southbound on the Bronx River Parkway at the time of the incident, according to the NYPD. Authorities said it was unclear whether any of the victims were wearing seat belts. In 2006, six people died in an accident on the Bronx River Parkway near the site of Sunday's crash. CNN's Miguel Susana, Steve Kastenbaum, Ross Levitt and Susan Candiotti contributed to this report.