Officials of the commission were said to have stormed Shoprite on Friday afternoon and drove everyone out and sealed off the massive premises, placing a seal order at the entrance.
The seal order notice read:
"Sealed: This premises has been sealed following the breach of safety law. This seal must not be broken. For further enquiries, contact the Commission."
On Friday night, many customers who did not know that the place had been shut were stranded outside the premises.
However, a source in the commission told reporters that the place was shut for failing to abide by the safety laws of the state.
The source said there had been complaints by members of the public about adulterated and expired products being sold in the outlet, adding that investigation was also carried out before the place was shut.
Investigation revealed that some products that were supposed to expire in one month's time were found on the shelves of Shoprite in Ikeja.
A customer, who craved anonymity, said she once bought expired milk at Shoprite, saying that the closure of the outlet was long overdue.
There have also been complaints by others about expired products at various Shoprite outlets.
Officials of Shoprite have been asked to report at the commission's office on Monday while the outlet remains shut throughout the weekend.