BEIJING - A full report into the cause of the deadly Wenzhou train crash is still being drafted, a source with the State Administration of Work Safety said on Friday, as the authority comes under increasing pressure to fulfill a pledge to publish its findings this month.

"The report is being drafted," said the source, who did not want to be identified discussing the investigation. "It has not been submitted to the State Council for approval, as some media reported."

The source did not indicate when the public can expect the final report.