KIEV (Reuters) - Three people died, including a NATO representative, in an explosion at a military installation in northern Ukraine, the Ukrainian defense company Ukroboronprom said on Friday.

The explosion occurred on Thursday afternoon while a missile was being unloaded from a vehicle, the company said in a statement. It said two other workers were injured.

Local media said the NATO representative was an Ukrainian who monitors the disarming Soviet-era weapons, a process partly financed by NATO.

Ukraine, the western-most outpost of the former Soviet Union, inherited thousands of tonnes of obsolete ammunition and weapon which is due to destroy.

(Reporting by Pavel Polityuk, editing by Larry King)