MOSCOW (AP) -- A team of international observers monitoring the shaky cease-fire in eastern Ukraine says it came under fire while inspecting a village.

No injuries were reported in the incident Sunday in Kominternove.

A statement from the monitoring mission of the Organization for Security and Cooperation in Europe said the team came under small-arms fire about midday and left the area immediately.

The village is about 20 kilometers (12 miles) northeast of Mariupol, a strategically key port city on the Sea of Azov held by the government.

It wasn't immediately clear who was behind the fire.

Eduard Basurin, a top official for the Russia-backed separatist rebels in eastern Ukraine, was quoted by rebel news site DAN as saying the shots apparently came from government forces.

The government didn't immediately comment.