Three alleged al Qaeda plotters were arrested in Norway Thursday; they’re suspected of being part of a terrorist plan similar to plots in New York and the U.K, for which five people were charged Wednesday. The men have been watched for more than a year. Investigators say the men were planning to use bombs similar to the one used by the thwarted New York subway bomber last year. Officials said they weren’t sure whether the latest plotters had picked out a target to explode their homemade peroxide bombs. They also aren’t sure why Norway was a target (though al Qaeda’s second in command, Ayman al Zawahri, has named Norway among other countries, as a possible target for terror.) Salah al Somali, who once headed al Qaeda’s external operations, is thought to have organized these plots. A drone killed al Somali last year; he was thought to have planned the attempted subway attack.