BASEL, Switzerland, April 24 (Reuters) - UBS is "seriously concerned" about some of the discussions related to additional capital requirements for the Swiss banking industry, the Swiss bank's chairman Colm Kelleher said at the lender's annual general meeting on Wednesday.

"UBS is not too big to fail," he said, adding that it is one of the best-capitalized banks in Europe. (Reporting by Noele Ilien, writing by Andrey Sychev)