Story Highlights• Alleged plotters planned to use liquid explosives and electrical charges
• 24 people were arrested in August 2006; 14 are still in custody
• Tip to police foiled plot to attack U.S.-bound flights
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LONDON, England (CNN) -- Another suspect has been arrested in connection with a planned attack on U.S.-bound passenger jets using liquid explosives, Britain's Metropolitan Police announced Wednesday.
The 27-year-old man was taken into custody Tuesday at an address in the Waltham Forest area of London, police said.
In August 2006, 24 people were arrested in raids connected to the plot. Fourteen of them remain in custody.
The man was arrested on suspicion of the commission, preparation or instigation of acts of terrorism under the Terrorism Act 2000, according to police.
It's not clear what his alleged role was in the plot.
Security sources said the alleged plotters intended to use an electrical charge to detonate liquid explosives in planes as they flew at maximum cruising altitude over the Atlantic Ocean, making it difficult for investigators to retrieve evidence.
A search of the Waltham Forest address is ongoing, as are searches at a neighboring address and a business in the Camden area of London, authorities said.
According to a British intelligence official, the planned near-simultaneous attacks -- which one top U.S. official said were intended to be "a second September 11" -- were foiled when a member of the country's Muslim community contacted authorities after noticing an acquaintance acting suspiciously.
An undercover British agent then infiltrated the group to gather information, U.S. government officials told CNN.
CNN's Andrew Carey contributed to this report.
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