Singer Amy Winehouse has been questioned in connection with a video which allegedly showed her smoking crack cocaine.

A Scotland Yard spokesman said officers from Tower Hamlets interviewed a 24-year-old woman on Tuesday in connection with an allegation of unlawful possession of a controlled drug.

He said she was not arrested, but was interviewed under caution and inquiries were continuing.

Last month footage obtained by the Sun appeared to show Winehouse inhaling fumes from a crack pipe after a 19-minute drugs binge in which she snorted ecstasy and cocaine and admitted to downing six Valium.

The disturbing images were said to have been filmed during a party at Winehouse's east London home, hours before she attended a court hearing for husband Blake Fielder-Civil.

He is awaiting trial on charges of assault and conspiracy to pervert the course of justice.

At the time Winehouse's father Mitch told the Sun: "Your video of Amy taking drugs may well be the best thing that has ever happened to her.

"For all the hurt and pain, it may finally be the thing to focus her mind and convince her to get the help she needs to quit for good."

The former student at Croydon's Brit School is now in rehab, admitting herself to the Capio Nightingale clinic in north London on January 24 days after the video appeared.