Emergency crews are battling a fire outside the Ukrainian capital, Kiev, following a huge blast at a fuel depot. On Tuesday people in a 2km (1.24 miles) zone around petrol containers on fire have been evacuated. The blaze broke out on Monday evening, and one worker at the plant died. An explosion on Tuesday morning left three firefighters unaccounted for and another six taken to hospital. The fire spread to at least 16 tanks, most of them storing petrol and next to Hlevakha airbase and near the village of Vasylkiv. The army has been clearing a munitions storage facility, located about 50m (164ft) away, amid fears that the fire could spread. It was not immediately clear what might have caused the blast.