DES MOINES, Iowa (AP) -

Gov. Terry Branstad is defending his decision to grant bonuses to some state directors.

The Gazette reports Branstad says bonuses should reward achievement, and he favors it over raising state salary caps.

Some Iowa lawmakers questioned Branstad for signing off on the bonuses because they say it raised the directors' pay beyond legal state salary caps. Some say he may have overstepped his authority.

Branstad approved a bonus for the state revenue director that raised her salary above the maximum of about $154,000. Branstad also authorized a bonus for the public safety commissioner that raised his salary above a maximum of about $128,000.

The director of the Iowa Economic Development Authority also has received more than $90,000 in bonuses.