Ukraine set conditions for letting in Russian aid shipments to rebel-held eastern regions as the U.N. said the death toll in the separatist conflict nearly doubled to more than 2,000 in two weeks.After earlier vowing to block a massive Russian convoy headed for its borders, Kiev said Wednesday it could allow the aid to enter the country after it was inspected by Ukrainian border guards and foreign monitors.Ukraine has raised fears the convoy of nearly 300 trucks could be a "Trojan horse" bringing military help to pro-Moscow insurgents who launched a rebellion in the country's east.Tensions have risen as the convoy rumbled toward the border, with Western capitals fearing it could spark an escalation in a conflict that has already brought ties with Russia to their lowest point since the Cold War.But as the humanitarian crisis in the east worsened, President Petro Poroshenko's office suggested the much-needed aid could be allowed in to avoid what it called a "large-scale invasion" by Russia.The proposal would allow aid for the hard-hit eastern city of Luhansk "to cross over the nearest border post" after it had been checked by Ukrainian officials and monitors from the Organisation for Security and Cooperation in Europe (OSCE), presidential spokesman Svyatoslav Tsegolko said.The mission would then be allowed to travel across rebel-controlled territory to Luhansk where the "Red Cross would distribute aid to civilians", he said.It was unclear if the trucks or just their content would be allowed into Ukraine. The OSCE could not confirm to Agence France-Presse if it would be involved. Kiev has long accused Moscow of fuelling the pro-Kremlin insurgency, and Prime Minister Arseniy Yatsenyuk said Moscow's aid delivery was a cynical ploy."First they delivered tanks, Grad missiles, terrorists and bandits to shoot Ukrainians and now they are delivering water and salt," he told a cabinet meeting.Moscow should have sent empty trucks "to take back their bandits" rather than sending aid, he said. The convoy left the Moscow region on Tuesday carrying more than 1,800 tons of supplies including medical equipment, baby food, sleeping bags and electric generators, Russian media reported.Russia insists that it coordinated the mission with the International Committee of the Red Cross, and that the convoy does not include military personnel.The convoy was apparently stalled for much of Wednesday at an airfield in the southwestern Russian city of Voronezh. There is no doubt of the need for aid.Four months of fierce battles between Ukrainian forces and insurgents have left rebel strongholds in the east without power, running water or fuel, and with dwindling food supplies.Rebel fighters have been losing ground to government forces and as the fighting has intensified the U.N. human rights agency said Wednesday that the number of dead had doubled in two weeks.As of Sunday the death toll had hit 2,086, up from 1,129 on July 26, the agency said, adding that the figures should be considered "very conservative".