Germany’s chancellor decries ‘unfriendly attacks’ on banks after UniCredit prepares to raise its stake in the lender.

UniCredit is "doing well" to act within the European Union's internal market, Italian Foreign Minister Antonio Tajani told the Class CNBC network on Monday, commenting on the Milan-based bank interest for Germany's Commerzbank .

Italy's Unicredit announced on Monday that it has boosted its stake in Commerzbank to around 21% through the purchase of financial instruments relating to 11.5% of the shares in Germany's second-largest bank.