A spokesperson said: "P&O Ferries is not going into liquidation. We have asked all ships to come alongside, in preparation for a company announcement. Until then, services from P&O will not be running and we are advising travellers of alternative arrangements."
The cross-Channel operator has said on Twitter that sailings between Dover and Calais scheduled for 11:10am, 11:15am and 12:35pm will no longer run, and customers with tickets were instructed to check-in to rival ferry company DFDS' services.
In a message sent to staff, the company said the company announcement "will secure the long-term viability of P&O Ferries" and has the backing of Dubai-based DP World, which bought the ferry company for £322m in 2019.