Frustrated by guerrilla tactics from Islamic State militants, Iraqi forces paused for reinforcements on Friday in a major offensive to take back the city of Tikrit.

The operation appeared to have stalled for the time being, two days after Iraqi security forces and their mainly Shi’ite militia allies pushed into Tikrit, the home city of executed ex-president Saddam Hussein.

A source in the military command said Iraqi forces would not move forward until reinforcements reached Tikrit, of which Islamic State still holds around half.  […]