 On 4 June, a PKK suicide bombing in Tunceli killed seven soldiers and wounded six at a military base.Tensions across the Iraqi border also started playing up as Turkish forces entered Iraq several times in pursuit of PKK fighting and In June, as 4 soldiers were killed by landmines, large areas of Iraqi Kurdistan were shelled which damaged 9 villages and forced residents to flee.On 7 October 2007, 40–50 PKK fighters ambushed an 18-man Turkish commando unit in the Gabar mountains, killing 15 commandos and injuring three, which made it the deadliest PKK attack since the 1990s.