CAIRO — An Egyptian police brigadier-general was killed in three blasts outside Cairo University targeting riot police on Wednesday, according to Egyptian security officials.

The officials say the bombs went off seconds apart. Their target was the riot police deployed in the area daily in anticipation of protests by students loyal to ousted President Mohammed Morsi.

Four police officers were wounded,source added.

Egyptian state TV says the bombs were crude and homemade.

The officials spoke on condition of anonymity because they were not authorized to speak to the media.