According to the local media reports, the bomb exploded near a convoy carrying General Mostafa el-Nemr through a residential area of Alexandria on Saturday.
The bombing targeted Alexandria's security chief, two days before the country holds a presidential election, Egypt Daily News quoted officials as saying. However, he was unhurt.
An "urgent and wide" investigation of the attack has been ordered by Egypt's prosecutor general.
No terrorist group has claimed the responsibility for the attack so far.
The attack comes before Egyptians start a three-day voting process (March 26-28) on Monday to choose their next president. (ANI)