LONDON, Dec. 10 (UPI) -- Britain is "highly likely" to be the target of a terrorist attack around the Christmas holiday, British Home Secretary John Reid said Sunday.
"We know that the number of conspiracies of a major type are in the tens to 30 or round about that," he told Britain's "Good Morning Television" program.
Britain has raised its terrorist threat to "severe," the second-highest level, the BBC said.
While Reid said he did not think an attack was "inevitable," he warned "the terrorists only have to get through once, as they did on 7 July, for us to see the terrible carnage that it causes."
Suspected Islamist suicide bombers carried out a series of coordinated bomb attacks on London's public transportation system July 7, 2005, a day after London was named the host city of the 2010 Summer Olympic Games.
Reid added he thought the battle against terror would continue for "longer than a generation."
"When it came to the struggle against republican terrorism in Ireland and in the mainland here, that lasted 30 years," he said. "There is no indication to me that this is going to be resolved any quicker than that."