LONDON (AP) -- Britain's spy agencies had little warning of the terrorist attack in Mumbai, which bore some al-Qaida hallmarks but appears unlikely to be linked to the group's core leadership, officials said Thursday.
Westerners in India's financial center were targeted in the spectacular attack comprised of multiple, simultaneous assaults - a signature of past al-Qaida actions including the Sept. 11 attacks. But the Indian attack was carried out by gunmen and not the suicide bombers frequently employed by al-Qaida and its affiliates.
The group who claimed responsibility - Deccan Mujahideen - was unknown to security officials, a British security official told The Associated Press on condition of anonymity because of the sensitivity surrounding the work. He said terror threats in India had been increasing but the scale of the attack on Wednesday was a surprise and there were no indications attacks would target Westerners.
"We have been actively monitoring plots in Britain and abroad and there was nothing to indicate something like this was about to happen," the official told the AP.
Britain is the former colonial power in India and Pakistan and closely monitors terrorist suspects in those countries. The majority of the nearly 2 million British Muslims are of Indian, Pakistani and Bangladeshi origin. More than 2,000 terror suspects are being monitored in the UK alone, with dozens more being watched in other countries, Britain's security services have said.
"It's too early to say definitively at this stage, but based on what we've seen so far this doesn't look like a core al-Qaida attack," another British security official told the AP on condition of anonymity. "It certainly looks to have been inspired by Islamic extremist ideology."
Western security officials believe attacks organized, directed and funded specifically by al-Qaida's core leadership along the Afghan/Pakistan border are not frequent. More common are incidents in which terrorists have either some limited contact with al-Qaida leaders, or are inspired to carry out attacks by the ideology of Islamic extremism.
Prime Minister Manmohan Singh blamed "external forces" and the Indian navy said its forces were boarding a cargo vessel suspected of ties to the attacks.
Pakistani officials in Britain said they were unaware of the plot. In September, a massive suicide truck bomb devastated the Marriott Hotel in the capital, Islamabad, killing at least 54 people, including three Americans and the Czech ambassador.
"This type of terrorism is spreading, through Pakistan and now India, but we were all surprised by such a large-scale attack like this," said Wajid Hassan, Pakistan's High Commissioner in London. "This is no coincidence that this type of attack happened so soon after the bombing of the Marriott Hotel. People from all countries are being paid to fight this al-Qaida war. This is a war that goes beyond any nationality."
Few terrorism experts have heard of the Deccan Mujahadeen.
"Initially we saw violence in India imported from outside - with allegations of Pakistani government support - but now we are seeing new, homegrown groups," said Nigel Inkster, director of Transnational Threats at the International Institute for Strategic Studies in London.
"There is a possible link to al-Qaida," he said. "Logically it would be easier for al-Qaida to get things done in India than in the U.S. and Europe. Everyone's been expecting some type of pre-U.S. election or post-U.S. election spectacular, and there is some speculation that this is it."
Associated Press Writers Gregory Katz and David Stringer contributed to this report.