He added: "In total six people have now been arrested in connection with that investigation - five at or near the address and one in Kent.

"The two further arrests were made when a man and a woman - both aged 28 - returned to the address later last night.

"Searches are ongoing at three London addresses - including Harlesden Road - as part of this investigation.

"Due to these arrests that we have made, I believe that we have contained the threats that they posed."