A powerful suicide bombing targeted an under-construction medical facility on Wednesday near Bagram Air Base, the main American base north of the Afghan capital, the U.S. military said.

The attacker struck the facility that is being built to help the Afghan people who live in the area, the U.S. military said. There were no coalition casualties and the base remains secure, the statement said.

Earlier reports suggested a U.S. military convoy might have been the target of the attack. No one immediately claimed responsibility for the bombing but both the Taliban and the Islamic State group stage near-daily attacks in Kabul and elsewhere in Afghanistan.

People stand near the site of an attack near the Bagram Air Base In Parwan province of Kabul, Afghanistan, Wednesday, Dec. 11, 2019. A powerful suicide bombing Wednesday targeted an under-construction medical facility near the Bagram Air Base, the main American base north of the capital Kabul, the U.S. military said. (AP PhotoRahmat Gul)

People stand near the site of an attack near the Bagram Air Base In Parwan province of Kabul, Afghanistan, Wednesday, Dec. 11, 2019. A powerful suicide bombing Wednesday targeted an under-construction medical facility near the Bagram Air Base, the main American base north of the capital Kabul, the U.S. military said. (AP PhotoRahmat Gul)

Dr. Sangin, a physician, said that the hospital near the perimeter of the base was on fire. It wasn't immediately clear if any foreigners were inside the hospital.

Gen. Mahfooz Walizada, police commander of northern Parwan province, confirmed the attack but offered no details on casualties.

Sangin, who is the head of the provincial hospital, said that they have received five injured, all Afghans.

Security personnel arrive near the site of attack near the Bagram Air Base In Parwan province of Kabul, Afghanistan, Wednesday, Dec. 11, 2019. A powerful suicide bombing Wednesday targeted an under-construction medical facility near Bagram Air Base, the main American base north of the capital Kabul, the U.S. military said. (AP PhotoRahmat Gul)

Security personnel arrive near the site of attack near the Bagram Air Base In Parwan province of Kabul, Afghanistan, Wednesday, Dec. 11, 2019. A powerful suicide bombing Wednesday targeted an under-construction medical facility near Bagram Air Base, the main American base north of the capital Kabul, the U.S. military said. (AP PhotoRahmat Gul)