The bank said in a bourse filing it could not rule out that the investors would be granted the right to go back to receiving interest payments on a 2008 floating-rate debt sale known as FRESH.

Rome committed 5.4 billion euros in July to rescue Monte dei Paschi, Italy's fourth-largest bank, to prevent a wider crisis, cancelling the investments of some of its bondholders.

As of Sept. 30, overall claims from civil lawsuits lodged by investors amounted to 4.42 billion euros, Monte dei Paschi said in the filing.

The bank also warned that it was running below targets in terms of net fees and lending and that low demand for credit might prevent it meetings its 2017 financial goals.

(Reporting by Isla Binnie, editing by Valentina Za)