The bombing, which wounded four other policemen, targeted Alexandria’s security chief, police Major General Mostafa al-Nemr, the interior ministry said.
There was no immediate claim of responsibility for the bombing. Islamic State released a video last month in which it warned Egyptians against taking part in the upcoming vote and urged Islamists to attack security forces and leaders.
State news agency MENA quoted Nemr as saying that two people, a policeman and a driver, were killed in the blast.
Photos on social media that Reuters could not independently verify showed a burnt out car and smoke at the site of the blast.
“On Saturday March 24 an explosive device planted underneath a car exploded ... as the Alexandria security chief drove by,” the interior ministry said in a statement.
Eyewitnesses said police and military personnel formed a cordon around the site of the explosion. Local television stations later showed Nemr unharmed and inspecting the area.
