Missing schoolgirl: Knife found in river is sent for analysis

Police frogmen are continuing to search a river near to where missing British teenager Alice Gross was last seen as a knife found in the water is sent for forensic analysis.

Hundreds of officers have been involved in the hunt for the 14 year old since she disappeared more than three weeks ago and attention will again focus on the River Brent and its banks near Ealing Hospital in west London.