Fourteen people have been arrested in dawn raids targeting suspects in a drug gang.
Officers from the Metropolitan Police carried out 19 warrants in Kentish Town, north-west London, at 4am on Wednesday and seized heroin and crack cocaine with an estimated street value of £25,000.
Shotgun shells, 9mm ammunition and at least £4,000 in cash was also seized, police said.
Fourteen men, aged between 18 and 57, were arrested for conspiracy to supply a class A drug, being concerned in the supply of a class A drug and possession of a class A drug with intent to supply.
Footage from the raid showed officers forcing entry into a flat and a terraced house, before leading people away in handcuffs.
She added: “This morning’s warrants were the culmination of months of hard work by my officers investigating a local gang who have caused and continue to cause detrimental effects to the community.
“The arrests of these individuals, some of whom have caused serious harm, show that we have listened to the concerns of residents and will not tolerate drug dealing, nor the violence it causes.
Those arrested all remain in custody, officers said.
Ms Tuff added: “Today’s operation demonstrates that communities have a vital role to play in tackling violent crime and we urge anyone who may have information to tell us, so that we can tackle violence together.”