LONDON, April 10 — A forthcoming government report concludes that the July 7 bombings in London were a low-budget operation carried out by four men who had no connection to Al Qaeda and who obtained all the information they needed from the Internet, The Observer reported Sunday.
According to The Observer, which said it obtained a leaked copy of the report, the attacks were "a simple and inexpensive plot" organized and executed by four British suicide bombers intent on martyrdom.
The bombings, which took place on three London subway trains and a bus on the morning of July 7, 2005, killed 56 people, including the four bombers, and wounded hundreds. A copycat attack by another group of men two weeks later failed when the would-be bombers' explosives did not detonate.
The Observer said the report, compiled by a senior civil servant on behalf of Charles Clarke, the Home Secretary, discounts the theory that anyone else was involved in the July 7 attack. After the bombings, the police found the bombers' car parked and full of explosives at the Luton train station, giving rise to the suspicion that a fifth bomber was at large.
The four men — Mohammad Sidique Khan, Hasib Mir Hussain, Shehzad Tanweer and Germaine Lindsay — were inspired in part by Mr. Khan's visits to Pakistan, according to The Observer's account of the report, although, the paper said, his meetings with Pakistani militants were ideological rather than logistical.
The men used relatively low-power explosives that they had built for just several hundred pounds, the Observer reported, quoting a government official as saying that "the London attacks were a modest, simple affair by four seemingly normal men using the Internet."
A spokeswoman for the Home Office said the report would be released "shortly."
"We never comment on leaked documents," she said.