Properties linked to a murderer who lived in the Brighton and Hove area were searched today by police.
The searches, which could last up to four weeks, are part of an investigation which has continued since serial killer Peter Tobin, 63, was jailed for life three years ago.
Sussex Police appealed for information about the two addresses to help their inquiries.
Detectives believe that Tobin was a caretaker/handyman at 152-154 Marine Parade, Brighton, during the late 1980s when it was known as the Seafront Hotel.
In 1992 the premises was converted into bedsit-style accommodation.
Officers are keen to locate the building company that carried out the conversion work.
Detectives would also like to speak to any previous tenants of 67 and 67a Station Road, Portslade, who have not already been interviewed by police.
Tobin is serving life sentences for the murder of 23-year-old Polish student Angelika Kluk and two teenagers, Vicky Hamilton and Dinah McNicol.
The Scot lived in the Brighton area at various times from the late 1960s to the late 1980s.
Detectives are believed to be trying to establish whether he could be responsible for the death of Jessie Earl, who vanished in 1980. Her bones were found at Beachy Head in 1989.
They also want to know whether he came across an 18-year-old called Louise Kay. She vanished 22 years ago and has never been found.
Anyone with information is asked to contact Sussex Police on 0845 6070999 or Crimestoppers on 0800 555111.
