IZVARYNE, Ukraine (AP) — An Associated Press reporter has seen the first trucks in a Russian aid convoy crossing into eastern Ukraine after more than a week's delay amid suspicions the mission was being used as a cover for an invasion by Moscow.

Trucks loaded with water, generators and sleeping bags are intended for civilians in the city of Luhansk, where pro-Russian separatist fighters are besieged by government forces. Shelling of the city has been ongoing for weeks.

The relief supply mission is proceeding despite both sides in the conflict ignoring pleas for a cease-fire.

The Red Cross has said it needs assurances of safe passage from all sides to bring in the supplies. So even without a formal cease-fire, Ukrainian forces could be constrained in their movements as the trucks begin arriving Friday.