LONDON, Dec. 29-- Husband and wife Mohammed Rehman and Sana Ahmed Khan have been found guilty of preparing terrorist acts in London, Sky news reports Tuesday.

Rehman, 25, asked his followers which target, Westfield shopping center or the London Underground, is suitable for a massive terror attack under the Twitter username "Silent Bomber."

Chemicals for bomb making were found at his home. Jurors at the Old Bailey were shown video said to show Rehman experimenting with home-made explosives in his back garden.

Khan, 24, was convicted of helping her husband plan the atrocity and paying for chemicals purchased online.

The couple was convicted of preparing terrorist acts. They will be sentenced on Wednesday.