Series of protests
Anger against the price hike was also the focus of a demonstration of around 2,000 people in Luanda on Saturday, with protesters also alleging government corruption.
There had been similar protests the two previous weekends.
Four people were killed on the first day of the unrest on Monday, according to police.
Local media reported other victims on Tuesday.
TV Nzinga showed women weeping over a body in a street in Luanda's central Cazenga area as people ran out of a supermarket carrying food and goods. The report did not say how the person was killed.
In the same area, a young man was killed near a supermarket, apparently by a stray bullet, an AFP reporter said.
Protests and unrest were also reported outside the capital, including in the city of Huambo, around 600 kilometres (370 miles) north of Luanda, police said.
Images on social media also showed protests in the coastal city of Benguela, south of the capital.
The Portuguese-speaking country of more than 36 million has a high inflation rate that neared 20 percent in June, while the unemployment rate hit almost 30 percent, according to the national statistics authority.