Real Sociedad have confirmed Mikel Alonso is joining Bolton Wanderers on-loan for the new season.

Mikel, brother of Liverpool midfielder Xabi Alonso, had a trial with the Trotters during their pre-season training trip to Austria last week.

"Real Sociedad and Bolton Wanderers have reached an agreement which will see Mikel Alonso play at Bolton Wanderers on loan for the 2007-08 campaign," read a statement on Sociedad's website.

"In the agreement, the English club will have an option to buy the player before May 2008."