Police say they are hunting five suspects over the knife murder of teenager Jaden Moodie.
A 65-year-old man has been arrested after a bomb squad was called to deal with “suspicious materials” found at a flat in Kent.
Police on St Lucia are investigating the possible murder of a British man on the island.
Authorities have seized a diamond ring worth £1.2m that an Azerbaijani banker bought in Harrods as part of an investigation into his unexplained wealth.
The number of police personnel investigating murder cases in London has shrunk by more than 25% in the last decade.