PITTSBURGH Authorities are investigating three bank robberies in two days in Pittsburgh, all of which occurred during ceremonies or preparations to honor three slain officers that drew thousands of police from other areas.

Two banks were robbed Thursday, a Fidelity Bank branch in the city's Troy Hill section and a Northwest Savings Bank downtown.

Both happened in the afternoon while officers gathered at a memorial service for the officers who were shot during a domestic dispute April 4.

On Wednesday morning, a National City Bank branch near the University of Pittsburgh campus was robbed as police prepared to display the bodies of the officers in the City-County building later that day.

No arrests have been made in any of the robberies.