London police on Sunday arrested six pro-Palestine activists for alleged plans to lock themselves to the doors of the London Stock Exchange to attempt to disrupt trading amid the ongoing Israel-Hamas war. The arrests came after a Friday tip from U.K. newspaper The Daily Express, which had sent a reporter undercover to Palestine Action group meetings where the protests were coordinated. "I'm grateful to the Express for their willingness to provide the information gleaned from their own investigation," Metropolitan Police Detective Superintendent Sian Thomas said in a statement. "It was instrumental in helping us intervene successfully.