PUL-E-KHUMRI, Afghanistan, May 14 (Xinhua) -- Four civilians were wounded after an improvised explosive device explosion ripped through a road in Pul-e-Khumri, capital of Afghanistan's northern province of Baghlan on Tuesday, local police confirmed.

"The injured were shifted to hospital by police after the explosion that occurred outside provincial communication department in Police District 1 of the city at midday. And the wounded were not in serious condition," provincial police spokesman Jawid Basharat told Xinhua.

The target of the blast remained unknown and an investigation was launched by provincial police into the incident, the police official added.

One vehicle was damaged in the incident, he said.

Over the past few months, Afghanistan has witnessed waves of terror attacks by the Taliban insurgents and Islamic State (IS) outfit.