Police divers are searching a canal in north London where a dismembered human torso was found dumped in a bag.
A stretch of Regents Canal, between London Zoo and Lisson Grove, has been cordoned off as the search continues.
The victim, who was stabbed to death, was found on Friday when someone saw a black and tartan shopping bag floating in the water near Primrose Bridge.
Police think the torso had been in the water for about seven or 10 days. They are trying to work out who the man was.
Tests to try to find out the victim's age and ethnicity are also being carried out.
Detectives want anyone who saw anything suspicious along that stretch of the canal between 14 and 24 June to contact them.