A group or person linked to the Islamic State group, also known as ISIS, hacked into the website of one of China’s leading universities late Sunday, according to local media reports. Tsinghua University’s website for teachers and students was allegedly hacked by ISIS with some of its pages being replaced with a photograph and audio in support of holy war, or jihad, CCTV news reported.

The university’s campus newspaper Qingxin Times reported that hackers left a message in English on the site that read, “Everything is OK in the end. If it’s not OK, then it’s not the end.” Some pages were also replaced with an ISIS photo, along with the words, “Allah is great. I don’t fear death. Sacrifice is my ultimate goal,” written in Arabic, CCTV news wrote on its Facebook page.

If ISIS involvement is confirmed, this would be the first time that the militant group targeted a website based in China.

The website was shut down by the university to “prevent further spreading of the message,” the South China Morning Post reported, citing the Legal Evening News. According to reports, other websites on the Beijing university’s server, including its homepage, remained unaffected.

Tsinghua University is one of the top state universities in mainland China and is involved in many defense and national security research projects.