British police have launched a murder investigation after the death of a one-year-old boy in north London.

A girl of the same age, believed to be his twin sister, was also found critically injured at a flat in Finsbury Park.

Police are searching for a 33 year-old man - Bidhya Sagar Das - after officers were called last night.

No arrests have yet been made.

Sky News reporter Charlotte Lomas is at the scene: