Several wounded in blast in central Turkish city
Initial television pictures showed that the bus had been reduced to a smouldering wreck by the impact of the blast.
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The Dogan news agency said that the blast took place opposite the Erciyes University in the city. NTV television said that there could be fatalities as a result of the blast.
The explosion comes a week after 44 people were killed in an attack in Istanbul claimed by Kurdish militants.
Turkey has seen a spate of deadly bombings in 2016 blamed both in jihadists and Kurdish militants that have left dozens dead.
One of the main cities of central Turkey, Kayersi is a key industrial hub that is usually seen as a peaceful area.
It is well west of the southeast of the country that has been hit by months of deadly fighting between Kurdish militants and the security forces.
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