London ? One of the suicide bombers who struck London’s transit system a year ago warned in a video broadcast Thursday that the attacks were only the beginning of a campaign of terror.

The video was broadcast by Al-Jazeera TV on the eve of the first anniversary of the July 7, 2005, bombings that killed 52 people and the four bombers.

It showed Shehzad Tanweer, wearing a red-and-white checkered keffiyeh, pointing his finger at the camera.

“What you have witnessed now is only the beginning of a series of attacks that will continue and increase in strength until you withdraw your soldiers from Afghanistan and Iraq, and until you (the British government) stop your financial and military support for America and Israel,” Tanweer said, speaking in English.

The 22-year-old suicide attacker killed seven people and himself aboard a London Underground train. All four of the suicide bombers were British.