Ukraine crisis: Russian aid convoy arrives at border

Lorries from a Russian convoy carrying aid to eastern Ukraine have reached a border post controlled by separatists.

But they seem unlikely to cross into Ukraine immediately as the Red Cross said it had still not received security guarantees for the convoy to continue.

Earlier Ukraine's military said that separatists had shot down a government fighter jet near the rebel-held city of Luhansk in the east of the country.

David Stern reports.