Italy's Banco BPM, the target of an unsolicited all-share offer announced by UniCredit, should remain an independent bank, its CEO said in a letter to staff on Wednesday, warning of big job cuts if the deal went through.

Italian lender Banco BPM on Tuesday said the unexpected takeover offer by domestic rival UniCredit does not reflect its profitability and could reduce its legal autonomy. UniCredit offered to snap up Banco BPM for roughly $10.

Banco BPM SpA said the takeover bid it has received from UniCredit SpA wasn’t agreed in advance and isn’t in line with its performance.