KABUL, Afghanistan (AP) — An Afghan official says a suicide bomber has targeted a minibus with workers from a Turkish construction company, killing three Turkish engineers.

The spokesman for the governor in eastern Nangharhar province says the attack happened on Monday morning as the Turkish workers were travelling to work in the district of Behsud.

Ahmad Zia Abdulzai says the bomber drove a motorcycle. The explosion killed three Turkish engineers and wounded a fourth. The team was working on a construction project in Behsud.

No one claimed responsibility for the attack and officials at the Turkish Embassy in Kabul could not immediately be reached for comment.