Mystery as severed human head is dumped outside courthouse before cops find decapitated body on river bank nearby

: "The man then just sat there a few meters from the head. He allowed himself to be arrested without resistance.”

Another witness, Fuat Ayman, did not at first realise what he was looking at.

He said: "I only noticed hair, and initially thought it was a teddy bear.

"Then the police came and arrested the man who was sitting there.

"Relatives of the victim came later, they apparently identified him and ran away crying.”

The rest of the body was discovered soon after on the river bank near Alter Zoll, around half a mile away.

The suspect may have carried the head through the streets of the former West German capital to get to the court, reports say.

Forensics teams were examining both scenes today.

They also searched bins but have so far failed to find the murder weapon.

Police say a 38-year-old suspect will be brought before magistrates today.

He is reportedly known to police for drug offences, but his alleged motive for the killing remains unclear.

The victim was 44 and from the city's homeless community, Bild reports.