SHANGHAI, Nov 25 (Reuters) - Chinese regulators have launched an investigation into the use of insurance funds in a bid to combat any illegal use and to curb risk in the industry, the state-backed Shanghai Securities News reported on Thursday. It said an earlier routine inspection had found some insurance institutions had serious compliance issues. Institutions now have to formulate rectification plans - including holding accountable staff responsible for violations or lapses - deeply analyse the root causes of problems, re-examine assets and promote reasonable capital replenishment, the newspaper said.