Police have arrested a second person on suspicion of murder following the death of a man, believed to be in his 30s, during a break-in.
A 15-year-old boy is appearing in court today charged with murder and a 17-year-old male youth is being questioned at a south London police station.
The victim, who police believe to be Martin Thomas, was found with serious injuries at a property in Roehampton, on Tuesday. A post-mortem examination revealed he died from a stab wound that punctured his lung.
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PC Keith Palmer, 48, stabbed by Khalid Masood while on duty in the grounds of the Palace of Westminster last Wednesday.
Those gathered on the bridge fell silent at 2.40pm - the time the first call was made to police exactly seven days ago.