Some 97% of Dublin Bus drivers have rejected a deal on changes to work practices and pay rises.

Over 2,500 staff were balloted on the deal which was backed by SIPTU and the National Bus and Rail Union (NBRU).

Union sources told Newstalk drivers feel the deal would have meant longstanding work practices would have been 'undermined.'

The agreement would have included pay rises of about 14%.

Around 100 drivers held a protest outside Leinster House last week over the proposals, ahead of a final vote on the deal on August 12th.

They warned that in return for the pay rises, they would have to work more unsociable hours and different routes

The two unions are expected to issue a joint statement on the vote tomorrow.

Dublin Bus is now considering the result of the vote.