“The risk zone has expanded, and attacks are reaching further offshore,” Maersk said in an updated advisory to customers on Monday.

“This has forced our vessels to lengthen their journey further, resulting in additional time and costs to get your cargo to its destination for the time being,” it added.

The Danish company, viewed as a barometer of world trade, last week said that shipping disruptions caused by the Red Sea attacks were expected to last at least until the end of the year.

The knock-on effects included bottlenecks and so-called vessel bunching, where several ships arrive at port at the same time, as well as equipment and capacity shortages.

“We are doing what we can to boost reliability, including sailing faster and adding capacity,” Maersk said, adding that it had so far leased more than 125,000 additional containers.

“We have added capacity, where possible, in line with our customers’ needs,” the company said.