Seven people have been arrested over the murder of a man who died after being shot in a car in north London.
Lee John Hook, 35, was discovered with a bullet wound on 22 October at 0140 BST in a blue VW Golf car in Harrow.
He was taken to a north London hospital and remained in critical condition for six days, dying on 27 October.
Now four men and three women in their 30s have been arrested in Newquay. They are being held in police stations across Devon and Cornwall.
Det Ch Insp Tim Duffield said: "Following a joint operation involving officers from the Metropolitan Police Service and Devon and Cornwall Constabulary, seven people have been arrested in Newquay in connection with the recent murder of Lee John Hook.
"I understand that recent police activities in Newquay may have raised concerns amongst local people.
"But would like to stress that the police operation has been successful and there is no threat to public safety."