A yet to be identified person has been shot dead outside the Shoprite premises around Jakande, Lekki area of Lagos state.
A witness whom described the victim as a protester said he was killed after an angry mob set a police van on fire during a protest on Tuesday.
Aggrieved persons had stormed the complex located on the Lekki-Epe expressway, chanting violent songs.
Policemen on ground had prevented them from gaining access into the mall but the protesters lit bonfires.
They also set up barricades around the complex, compounding the traffic situation along the ever-busy expressway.
The development comes a day after reports of attacks on foreign nationals, including Nigerians, in South Africa, went viral.
There has been a nationwide outrage over the fresh attacks on Nigerians based in South Africa. Geoffrey Onyeama, minister of foreign affairs, had accused the South African police of complicity.