The attack on Thursday targeted two municipality personnel and a civilian returning from distributing aid to a neighborhood placed under quarantine as part of measures to curb the coronavirus outbreak.
Turkey's communication director Fahrettin Altun and other officials blamed the Kurdistan Workers Party (PKK) for carrying out the attack.
The PKK, which has waged an insurgency against the Turkish state since 1984, is designated a terrorist organization by Turkey, the United States and the European Union. More than 40,000 people have been killed in the conflict.