Pan-European stock market operator Euronext said it canceled all equities orders placed since Tuesday's market close due to technical problems.

"Due to a technical issue, a global command has been applied at 12.02.49 CET (Central European Time) to cancel all orders on the Equities segment," it said in a statement.

"All orders from Equity order books submitted before 12.02.49 CET have been canceled including overnight orders. Clients are requested to re-submit their orders again."