* Suicide bombers take over police station in Baiji
* Bombs across Baghdad kill dozens of people
* Security forces expect more attacks ahead of Shi'ite ritual (Updates death toll and adds new attack)
By Ghazwan Hassan
TIKRIT, Dec 16 (Reuters) - Suicide bombers and gunmen killed scores of people in Iraq on Monday in attacks mostly targeting Shi'ite Muslim pilgrims and official buildings ...