A member of the Chinese State Council estimated that at least 10,000 civilians were killed in the Tiananmen massacre of June 4, 1989, declassified files reveal. Alan Donald, Britain’s ambassador when the Chinese government sent tanks into Tiananmen square to quell the student-led protests, sent telegrams to the foreign office on June 5, a day after the massacre. He said a person – whose name was redacted from the document – passed along the information from an unnamed member of the State Council.