BERLIN, June 10 (Reuters) - German Chancellor Friedrich

Merz criticised UniCredit's effort to build up a stake in

Commerzbank on Tuesday, saying that the Italian lender's

approach was unacceptable.

"I share the view of the federal minister of finance that an

uncoordinated and unfriendly approach such as that of the

UniCredit Group is unacceptable. This is particularly true when

it comes to a systemically important bank such as Commerzbank

AG," Merz wrote in a letter to labour representatives posted on

LinkedIn.

The letter was dated May 26 and was posted by works council

head Sascha Uebel.