JAKARTA, May 23 (Reuters) - Indonesia's state-controlled lender PT Bank Mandiri Tbk will issue up to 5 trillion rupiah ($340.25 million) in green bonds in June, the bank said in a statement on Tuesday.

The proceeds will be channeled environmentally-friendly business activities, Bank Mandiri said. ($1 = 14,695.0000 rupiah) (Reporting by Stefanno Sulaiman)