Supermarket bomber may be on film

Detectives are hoping that security cameras may have filmed the "Mardi Gra" bomber during his latest attacks on the Sainsbury's supermarket chain.

Hours of videotapes were being examined yesterday in the hope that they may reveal the identity of the man who planted incendiary bombs at three London stores on Saturday.

One man was slightly injured and a store worker was treated for shock after two of the devices, at Greenford and West Ealing, burst into flames. A third bomb at Sainsbury's in Ruislip was defused by police.

The Mardi Gra bomber - so-called because the devices included a message bearing the words "welcome to the Mardi Gra experience" - first struck in December 1994, when his attentions were directed at Barclays Bank. More than 20 devices were targeted at Barclays until July 1996, when he began threatening Sainsbury's.