Chernobyl wildfire nearly extinguished

Firefighters have nearly extinguished a forest fire near Ukraine's Chernobyl plant, the scene of the world's worst nuclear accident in 1986.

"There are no more open flames," but fires are still smouldering out of sight, said the deputy head of the emergencies ministry, Mykola Chechetkin, cited by Interfax-Ukraine news agency.

"Until it is completely extinguished, we will carry out measures to observe and douse it. I think we will carry out these measures for another 48 hours," he said.

A Ukrainian scientist, meanwhile, criticised the authorities for a lack of safety equipment for the firefighters including face-masks.

"Their respiratory organs aren't protected. They are simply using spades or some kind of brushes to beat out the flames and they are breathing in that smoke," said the head of the general radiation safety department at the Institute for Nuclear Research, Sergiy Azarov.

The blaze came within about 20km of Chernobyl after breaking out on Tuesday afternoon, but officials said it posed no danger to the plant and radiation levels in the zone remained unchanged.

Emergency services say firefighters are now battling isolated areas of flames "within a controlled perimetre".

The area around Chernobyl was evacuated after the 1986 blast and the last reactor there was shut down in 2000 but some personnel still operate in the exclusion zone, where work is underway to build a new seal over the reactor site.

Officials gave few details of the possible cause of the fire but Ukraine's Interior Minister Arsen Avakov said authorities had not ruled out arson.

The fire struck just two days after Ukrainians marked 29 years since the Chernobyl nuclear disaster.