LOS ANGELES (MarketWatch) -- The White House plans to publicly release evidence of how Syria's regime used chemical weapons against civilians, possibly as early as Thursday, the Washington Post reported late Tuesday. The Office of the Director of National Intelligence is assembling the report, which the Post said is one of the final steps before the U.S. commits to a military strike against Syrian government targets. The news report said an attack "now appears all but inevitable," quoting Defense Secretary Chuck Hagel as telling the BBC Tuesday that "we are ready to go." It said that ahead of an attack, the administration would need to finish consulations with Congress and with its international allies. The U.K., France and Turkey have all signaled they are willing to assist in a military strike, the report said.