Becky Watts disappearance: What we know

Police are intensifying efforts to find missing teenager Becky Watts.

Here is what we know about the 16-year-old's disappearance.

• February 18: Becky stays overnight at a friend's house

• February 19: She returns to her home in Crown Hill, St George, Bristol, at around 11.15 am before leaving with her phone, laptop and tablet. She did not tell friends or family where she was going, or take extra clothing

• February 20: The teenager is reported missing by her family at 4pm

• February 23: Her father Darren Galsworthy and grandmother Pat Watts appeal for her to come home

• February 24: Police appeal to local communities to help find Becky

• February 26: Detectives say there is "nothing to suggest" the missing 16-year-old has come to harm despite fears from her father that she may have been attacked

• February 27: Police carry out specialist open water searches at a pond in St George's Park, which they say is a "routine" part of the investigation and not based on specific intelligence

• February 28: Two people are arrested in connection with Becky's disappearance - the 16-year-old's family say they are "preparing for the worst"

• March 1: Police search three properties including Becky's home as her uncle tells ITV News that his family is "almost at breaking point"

• March 2: Police are given a further 36 hours to question the two people arrested

• Police also appeal for witnesses who saw a black Vauxhall Zafira - registration HY06 HYA - between the "critical time period" of Thursday February 19 and Monday February 23