The homicide investigation into the death of Whanganui man James Butler has turned to a search for weapons involved.
The National Dive Squad has been called in to search the Whanganui River and police will be carrying out further forensic examinations at the scene on Thursday and Friday.
Butler was found dead at a Wikitoria Rd property when emergency services were called to the scene on Sunday evening.
A specialist search group is also carrying out an examination on Wikitoria Rd.
Police are hoping to find weapons the offenders involved in Butler's death may have discarded.