Police in Brixton said the man they have arrested following a fatal stabbing where a 28-year-old woman was killed trying to protect her younger sister, is known to them, but would not give any more details.
Speaking this afternoon, Detective Reynolds said young children were at the scene of both attacks, which involved "extreme violence", and officers are trying to establish whether they saw anything significant.
More top news
European football might not want him, but most of the rest of the world does - and very soon that support will drift into the ballot box.
Thousands of people have signed a petition calling for 'Britain's Hardest Grafter' to be scrapped before filming even begins on the series.
Apple has found a solution to the text message bug that was able to crash users' iPhones.