How true is it that these girls were beheaded?

                   
                                             
This story has been making rounds since Sunday of how these three girls (pictures above) were beheaded and their bodies thrown out of a moving Range Rover Jeep somewhere in Ogun state. For those of you on blackberry, am sure you must have come across this broadcast:

"These 3 ladies were said to have been beheaded and thrown from a moving Range-Rover Sports Jeep @ Ijebu-Ode--Ibad­­an road just now...11.55pm Sunday night.One is fair in complexion with Unilag School I.D card (Yetunde Ajao) inside her hand-bag,the second is an OOUITE student (Oyindam­­ola Esan), also fair in complexion and kinda tall and the last one is short, plumpy and dark with no identity tag...Please if you know any of these girls kindly notify their friends or family member to come right away and remove their corpses....On-coming vehicles can run over them at anytime because they were dumped by the road side"..

As at this moment, the Ogun State police have denied the story and am wondering...if it's false, how come this three girls pictures were published as those beheaded...and if indeed it's true, who are those behind the act?