CAIRO (AFP) - A bomb blast outside a branch of French supermarket giant Carrefour killed one person and wounded six on Sunday in the Egyptian city of Alexandria, police said.

Since the military ousted Islamist president Mohamed Morsi in 2013, militants have repeatedly set off explosives in Cairo and Alexandria, but the deadliest attacks have been in the Sinai Peninsula.

In Sunday's attack, a bomb went off only metres away from the Carrefour supermarket in the northern city, killing one person and damaging the facade of the building, the police said.

It comes three weeks after France signed an agreement with Egypt for the sale of its Rafale fighter jets, in a deal boosting Cairo's military as it tackles jihadists on two fronts.

A separate bomb attack in Alexandria on Sunday targeted a police station, and left three bystanders wounded, police said.

The Cairo government says hundreds of police and soldiers have been killed in Egypt since the overthrow of Morsi in revenge attacks carried out by jihadists.

Amnesty International says that since Morsi's ouster, a brutal crackdown on his supporters has killed more than 1,400 people, while thousands more have been jailed.