High-end department store Harrods says it is the latest retailer to have been targeted by a cyber attack.
The firm told the BBC it had "restricted internet access at our sites" following an attempt to gain access to its systems.
It comes the day after the Co-op shut down parts of its IT systems to fend off a hack, while Marks & Spencer continues to deal with a cyber attack that has cost it millions of pounds in lost sales.
Harrods said its flagship store remained open, and it continues to operate its online sales.
Harrods did not clarify what the scale of the impact on its network was, but said customers were being asked to "not do anything differently at this point".
FTSE 100
The UK's flagship share index, the FTSE 100, was up 62 points at 8,557 shortly after opening this morning.
Brent crude oil futures were up 0.55% at $62.19 a barrel.
Companies reporting today:
- Chevron - Q1 Results
- NatWest Group - Q1 Results
- Pearson - Q1 Trading Statement
- Shell - Q1 Results
- Standard Chartered - Q1 Results