Ankara - Five people were killed and 60 people injured in a suspected bomb explosion in Ankara Tuesday evening, Turkey`s NTV television station reported.
The explosion hit the busy Ulus area of the city at around 6 p.m. (1300 GMT) at a bus stop outside a block of offices just as the streets were full of commuters heading home.
Television footage showed widespread damage to buildings near the blast with many buildings having their windows blown out.
NTV quoted police sources who said they had found traces of A-4 plastic explosives with police immediately labelling the rebel Kurdish Workers` Party (PKK) as a prime suspect.
In the past two months police have seized some 200 kilogrammes of A-4 plastic explosives during raids around the country on PKK suspects. The explosives were smuggled into Turkey from neighbouring Iraq.
Witnesses said they had seen a suspicious package left at a bus stop at the scene of the blast but it was not clear whether the blast was caused by a suicide bomber or set off by remote-control.
Ankara Mayor Melih Gokcek said five people had been killed and around 60 injured in the blast. He said that two people were listed as being in a critical condition.