A Southall resident says a stabbing which killed a man in the area on Tuesday (March 28) follows an increase in gang violence there.
Met police launched a murder investigation after the 27-year-old was killed in Featherstone Road.
Another man, aged 31, received minor stab injuries during the incident and was taken to hospital.
A business owner, who asked to stay anonymous, runs a shop close to the scene of Tuesday's fatality.
The man, who has lived in Southall most of his life, said violent gang culture had become increasingly noticeable in the area.
He said: "It is pretty shocking. I was in Southall as a kid all my life and it is changing.
"I just think there is a lot of gang violence, I think you could see small gangs when I was growing up but now it is a lot.
"Many (were) just your typical robbers and things like that, now I hear about it all the time, there are police coming around saying if we saw anything.
"It is troubling to have that sort of violence outside."
On Facebook, some readers said they felt Southall had become less safe.
Al Gardner said: "Area is dropping down the safety league table rapidly."
Commenting on a post mentioning crime in Southall, one person, Ylime Esor Sttuc, replied: "I keep seeing things. Proper worrying."
A study from address experts, Hopewiser, also found there were more reports of crime iin Southall's Chevy Road than in any other city street in England and Wales, between July and December last year.
Police were called to or near the street 244 times, 183 of them for reports of violent and sexual offences.
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