Apple supplier Foxconn has stopped students from working illegal overtime at a factory in China.

It comes after the Financial Times reported Tuesday that six high school students in Henan province would work 11-hour shifts to manufacture Apple’s iPhone X.

The long hours breached Chinese laws which aim to prevent children from working more than 40 hours per week.

Apple said in a statement Tuesday the interns “should not have been allowed to work overtime” at the facility.

And on Thursday, the tech giant told the BBC: “Apple is dedicated to ensuring everyone in our supply chain is treated with the dignity and respect they deserve … We know our work is never done and we’ll continue to do all we can to make a positive impact and protect workers in our supply chain.”

The Financial Times report said the six students interviewed were among a group of 3,000 students from Zhengzhou Urban Rail Transit School.

Taiwan’s Foxconn Technology group – otherwise known as Hon Hai Precision Industry – reportedly hired the students to keep up with demand for Apple’s latest flagship phone.

In October, Apple told CNBC that customer demand for the iPhone X had been “off the charts” ahead of its official release on November 3.

Foxconn Technology group said in a statement the high schoolers were “provided with compensation and benefits.”