Marks & Spencer has paused deliveries of some food items to Ocado due to a cyber-attack, affecting a small number of items listed on Ocado.
The disruption caused by the hack has led to a loss of over £500 million from M&S's stock market value.
The cyber-attack has impacted M&S's online clothing and homeware sales and led to issues with online orders and payments.
The retailer has apologized for the inconvenience caused and reassured customers that no data breach has been detected.
M&S has hired cybersecurity experts and implemented measures to protect its network and customer data.
The technical issues have affected M&S's online and physical stores, with disruptions in payments and order collections.
Shoppers have faced difficulties with online orders, returns, and payments due to the cyber-attack.
M&S advised affected customers to wait for notifications before collecting orders and warned about potential scammers taking advantage of the situation.
Analysts predict a short-term profit impact for M&S, with uncertainties regarding the resumption of online sales.
M&S had reported strong sales over the Christmas period and is set to release full-year results on 21 May.