Norway is causing a problem for Domino's Pizza

Britain’s biggest pizza delivery firm Domino’s Pizza (DOM.L) said in a fourth quarter trading update that its full-year underlying pretax profit will be hit due to “growing pains” in the international market.

Despite selling a record number of pizzas on the Friday before Christmas — 12 per second — the pizza chain warned that full-year profit will be at the lower end of a consensus range.

“Our international businesses offer significant long-term potential, but we have experienced growing pains this year, particularly in Norway, where we have faced business integration challenges,” said David Wild, CEO of Domino’s in a statement.

“Looking ahead, we will invest further in robust teams and infrastructure in our newer markets, to create a solid platform for profitable growth.

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Wild added that there was one particular bright spot. He said: “I’m pleased with the continued strong performance in the UK and Ireland, where we opened a further 59 stores.

“Many families decided to kick off the festive season with a Domino’s, with the Friday before Christmas breaking all records as we sold more than 535,000 pizzas.”

While there were some upsides, investors shied away from the stock on concerns over its struggle with certain international markets. Shares plunged by nearly 9% within the first hour of trading.