Source: Sharecast
In a statement, the company said it continued "to manage the incident proactively and the M&S team - supported by leading experts - is working extremely hard to restore online operations and continue to serve customers well".
Shares in the company fell almost 5% in London trade.
"As part of our proactive management of the incident, we have made the decision to pause taking orders via our UK & Ireland websites and apps and some M&S International operated websites. The M&S product range is available to browse online, and our stores remain open and ready to welcome and serve customers."
M&S was hit by the incident earlier this week, affecting contactless payments and the pick up of online orders in stores. The company reported the hack to the National Cyber Security Centre and hired cybersecurity experts to help investigate and manage the issue.
The incident began on Monday with contactless payments and click and collect orders affected in stores across the country. However, there was a separate technical problem on Saturday, which only affected contactless payments, which resumed on Thursday.
Reporting by Frank Prenesti for Sharecast.com