Officials said a suicide car bomber targeted high-ranking officials traveling in a police Humvee in Lashkargah city, in Helmand, early Monday.

Early reports indicated at least one police officer was killed and a number of others wounded.

According to the provincial governor’s spokesman Omar Zwak police had been on their way to launch an operation to reopen the Kandahar-Lashkargah highway when the incident occurred.

No group has yet claimed responsibility for the attack.