The Qatar Investment Authority, the country's sovereign wealth fund, is considering raising its stake in Spanish power company Iberdrola, Spanish newspaper Expansion reported on Friday, citing unidentified energy sector sources.

Qatar, which has an 8.8% stake in Iberdrola, according to LSEG data, and is the utility's largest shareholder, has discussed the possibility with the Spanish government, the newspaper said.

The Spanish government has the right to block or put conditions on the acquisition of large stakes by foreign firms in strategic Spanish companies such as power utilities.

Iberdrola and the Qatar Investment Authority did not immediately respond to requests for comment.

($1 = 0.9029 euros)

(Reporting by Jakub Olesiuk; Editing by Inti Landauro and Mark Potter)