At least 15 Iraqi civilians were killed on Sunday when a warplane struck their house in western Mosul, according to an Iraqi rights activist.

"The victims were taking refuge inside the house when the plane struck the building," Mohamed Fadel told Anadolu Agency.

He said five other people were injured in the attack.

It remains unclear whether the airstrike was carried out by an Iraqi or a U.S.-led coalition plane.

Meanwhile, five Iraqis trying to flee western Mosul were executed by ISIS militants.

"Their bodies were dumped on the road leading to the positions of Iraqi security forces" in Mosul, federal police officer Sabhan Ali said.

PHOTO CAPTION

A broken window is seen inside an abandoned house in western Mosul, Iraq, April 12, 2017. REUTERS

Al-Jazeera