KIEV, Ukraine (AP) — Fierce fighting raged in eastern Ukraine on Thursday in what appeared to be a last-gasp attempt by government troops to snatch back territory from pro-Russian separatists before the arrival of a Russian aid convoy overseen by the Red Cross.

Trucks loaded with water, generators and sleeping bags for desperate civilians in the besieged city of Luhansk began moving through Ukrainian customs after being held up at the border for a week, in part because of safety concerns and Ukrainian fears that the convoy’s arrival could halt the military’s advance.