Istanbul - More than 50 Turkish fighter jets launched a wave of airstrikes against Kurdistan Workers' Party targets in northern Iraq, state-run Anadolu news agency reported Tuesday, after 16 soldiers were killed by the PKK.The airstrikes late on Monday involved 35 F-16 and 18 F-4 aircraft, the report said. According to the sources cited in the report, more than 35 members of the PKK were killed.The toll could not be independently confirmed. The Firat news agency, considered close to the PKK, only confirmed there were airstrikes overnight, but did not mention casualties.The PKK has bases in the Qandil mountain range in northern Iraq. Prime Minister Ahmet Davutoglu, speaking after the Sunday attack in the south-east, pledged the area would be "cleaned of terrorists".Meanwhile, a fresh PKK attack in eastern Turkey left one police officer dead and two wounded, the Dogan news agency reported.The Turkish state has been involved in armed conflict with the PKK since 1984. A two-year ceasefire broke down in July and since then more than 150 people have been killed inside Turkey, in addition to an unclear number of casualties in northern Iraq.