April 8 (Reuters) - Spain's Santander is

exploring options for its roughly $8 billion (7.3 billion euros)

majority stake in its Polish unit, including a potential sale,

Bloomberg News reported on Tuesday, citing people familiar with

the matter.

Santander shares were up 6.06% at 1451 GMT, while shares of

the Polish unit, Santander Bank Polska, rose 6.9%

after the Bloomberg report.

Santander declined to comment on the report. It owns a

62.2% stake in Santander Bank Polska.

(1 euro = $1.0910)