The Prime Minister has offered his condolences to the family of an 18-year-old murdered in Tulse Hill and said the issue of “growth of gangs” needs to be looked at.

Stretham MP Chuka Umunna asked a question about Nana Darko-Frempong’s death in Parliament, during Prime Minister Questions.

Mr Fempong, an Archbishop Tenison’s School pupil, was shot several times outside his block of flats on Tulse Hill estate on Monday (June 6).

Mr Umunna said: “I am sure that the whole House will want to send its condolences to his family. I raised a similar case with the Prime Minister this time last year.

“This senseless loss of life is completely and utterly unacceptable, yet it continues, and rightly or wrongly there is a perception that, on all sides of the House, we are not getting to grips with the root causes of this problem, which is blighting our inner-city streets.

“What reassurance can he give my constituents and the country that the Government are doing all they can to stop this senseless loss of life?”

Prime Minister David Cameron said Mr Umunna was right to bring the case to the House of Commons and sent his condolences to Mr Darko-Frempong’s family.

He said: “He is absolutely right that the level of gun crime and knife crime in our country, particularly in inner-city areas, is unacceptable.

“I do not think there is one single answer. Of course, we have to ensure that the police do everything they can to search for guns and knives and have a zero-tolerance policy, but we also have to look at where these problems are coming from, including the growth of gangs in our cities and the fact that in too many cases people are looking to gang, rather than to family and community.

“It is incumbent on us all to try and work out how we can strengthen the fabric of our communities, starting with our families.”

Witnesses to the murder are still being sought.

Detective Chief Inspector Gordon Allison from Trident is investigating.

There have been no arrests at present and enquiries continue.

Any witnesses or anyone with information should call DCI Allison on 020 8247 4554 or Crimestoppers anonymously on 0800 555 111.