Italian banks used a voluntary-contribution scheme set up under the depositor fund to come to Carige's rescue in November. The scheme bought a 320 million euro (£277 million) hybrid bond needed to boost the bank's total capital ratio. A conversion into equity of the bond would now support BlackRock's rescue plan for Carige.

A conversion is now "very likely" but no decision has been taken yet, the depositor guarantee fund's President Salvatore Maccarone told reporters after a meeting over the issue, adding talks with BlackRock were ongoing.

(Reporting by Giancarlo Navach, writing by Davide Barbuscia, editing by Valentina Za)