Four people have been arrested and £80,000 seized by detectives investigating the suspected theft of £1 million from two UK banks.
A suspected live hand grenade was also found at an address following raids in Enfield and Islington on Tuesday morning.
A number of bank customers downloaded malicious software onto their computer by opening emails claiming to be from their bank. A total of £1million was subsequently siphoned off from their accounts.
Detectives recovered a number of computers, smart phones, designer jewellery and a Range Rover.