The outlawed Kurdistan Workers’ Party (PKK) has claimed responsibility for Wednesday’s attack at a flagship defence firm in Ankara that left five people dead. The attack was carried out by an autonomous team from the “Immortality Battalion,” the PKK-affiliated news agency ANF wrote on Friday, citing the organization’s military arm HPG. The attack on Wednesday hit one of Turkey’s most important arms companies TUSAS, which develops armed drones. The drones are used in the fight against the PKK, according to local media. Four of the killed were TUSAS employees, while 22 people were also injured i…