The outlawed Kurdistan Workers' Party (PKK) not implicated in the explosion in Turkey's largest city, Istanbul, which injured 32 people, CNN Turk reported. The PKK reported about this in its communique.
It also announced the extension of the truce until Turkey's next general elections expected to be held in June 2011.
Earlier on Sunday, a blast hit a police patrol at Taksim Square, wounding 17 civilians and 15 police officers.