LONDON, Sept 4: Investigators were trying to determine on Sunday whether a London suicide bomber made his posthumous “war” video in Britain or Pakistan as they probe how deeply Al Qaeda was involved in the coordinated attack.

Though his headless body lies in a London mortuary, Mohammad Siddique Khan came back to haunt investigators with a video on Thursday warning of more bombings like the one on July 7 which killed 52 rush-hour commuters.

Khan was named by police as one of the four bombers, who all died in the attack.

A man identified as Khan said on the video that he admired Al Qaeda leader Osama bin Laden and his deputy Ayman al-Zawahiri, who appeared separately in the footage aired on the al-Jazeera television channel.

“We are at war and I am a soldier,” he said in a flat Yorkshire accent.

If the video were recorded in Pakistan, where Khan travelled in the months before the attack, it could point to Al Qaeda being more involved in the plot than had previously been known.

The Sunday Telegraph said British investigators were working with security services in Pakistan to find out where the video was made, possibly in Rawalpindi.

Rawalpindi is where Khalid Sheikh Mohammed, the alleged architect of the Sept 11 attacks on the US, was arrested.

If it were made in the northern city of Leeds where Khan lived, or elsewhere in Britain, it would make it more likely that Khan and his three cohorts took inspiration rather than orders from Al Qaeda, newspapers said.

The Guardian newspaper reported on Saturday that counter-terrorism officials still hold the view that the plotters were “home-grown,” and say there is no evidence of a “mastermind.”

The Sunday Times reported the video was being examined frame by frame for any clues as to when and where the video was made.—AFP