A good two days after the outbreak of the fire in Berlin's Grunewald forest, only small remnants are left.
There are still isolated fire spots "in the floor area", said a spokesman for the Berlin fire brigade on Saturday on request.
The focus of the emergency services is the police blast site in the forest where the fire started.
For the time being, there is still a restricted area of 1000 meters around the blasting site.
The nearby Avus motorway was closed on Thursday, and local and long-distance rail traffic is also interrupted in this area.
The fire brigade spokesman expressed the hope that the railway connection, which is just within the restricted area, could soon be released again.
However, the fire at the blast site in Berlin's Grunewald forest continues to pose a great danger to the immediate area.
The fire brigade expects the blocking circle around the fire to remain in place for a few more days.
"The extinguishing measures on the blasting site and the cooling measures for these three hotspots, which have been defined by the explosives expert, are having an effect," said fire department spokesman Thomas Kirstein on Saturday in Berlin.
The task now is to reliably ensure the cooling of the pitch.
If the extinguishing water supply remains permanent, rail traffic can be released again in the afternoon hours.
State-of-the-art technology from various organizations
The fire brigade had already imposed a safety radius of 1000 meters around the site on Thursday.
Only when the cooling is successful and the danger is reduced can the restricted area be reduced to a radius of 600 meters and then the Avus and the railway line can be released again.
The railway line between the main train stations in Berlin and Potsdam is closed because of the operation.
S-Bahn trains are affected, as are regional trains, ICs and ICEs.
Fire chief Karsten Homrighausen emphasized: "It is due to safety." In the event of further explosions from ammunition residues, material could be thrown far.
The explosives experts have identified three danger areas where the fire brigade will specifically cool.
In view of the complicated risk management, the fire brigade uses state-of-the-art and expensive technology from a wide variety of organizations.
The fire broke out on Thursday night at the blast site.
Tons of old grenades, ammunition and confiscated fireworks were stored in buildings on the site.
Explosions could be heard, the fire spread throughout the day in the dry forest area.
Cause still unclear
The cause of the fire in Grunewald is currently unclear.
"That was a big topic here today: How can this happen?" Said fire brigade spokesman Kirstein on Thursday evening on the RBB station.
Several buildings on the site were already "in full fire" when the fire brigade arrived.
The State Criminal Police Office must determine whether it was possibly arson.
There is also cooperation with the fire brigade and the police demolition experts.
According to the police, around 30 tons of "munitions and ammunition" from the Second World War and several hundred kilograms of fireworks, which were confiscated on New Year's Eve, were stored on the large area of the detonation site.
These stocks are blown up at regular intervals, most recently in March and April.
To be on the safe side, the stocks stored are “permanently rained on”.
There is also a fire protection concept, fire protection corridors and a fire alarm system.
The detonation site for the destruction of weapons and explosives has existed since 1950, and the police are now responsible Berlin simply does not have a sufficiently large area that can be approved to implement this.” Setting up a blasting site in Brandenburg is also a problem because of the long journeys.