At least five of the dead were reported to be children.
As the investigation continues, authorities said that the attack was probably carried out by a remote controlled device.
Baydemir condemned the attack
The blast in a park in the poor Baglar district, where the population is mostly Kurdish, came as the Democratic Society Party (DTP) called for a ceasefire on the pro-Kurdish militia group PKK and as a US envoy arrived in Turkey for talks on curbing a wave of bombs blamed on Kurdish militants.
Osman Baydemir, mayor of Diyarbakır commented that "the attack is a provocation to diminish efforts towards peace".
Executives of the Human Rights Association's (IHD) branch in Diyarbakır also condemned the attack saying ""causing social concern, fear and chaos was the main target of this vicious attack against civilian people".(EÜ)
* This morning the BBC reported that the Kurdistan Freedom Falcons (Tac), has said on its web site that they carried out this attack. Later it re-formulated the article and said "Bomb attacks in tourist resorts and other cities in recent weeks have also killed a total of 12 people and wounded dozens. One separatist militant group, the Kurdistan Freedom Falcons (Tac), has said it carried out those attacks".