The Logo of Huawei is seen at its showroom in Shenzhen, Guangdong province, China March 29, 2019. REUTERS/Tyrone Siu

(Reuters) – The Massachusetts Institute of Technology (MIT) said on Wednesday it has halted collaborations with Huawei Technologies and ZTE Corp over U.S. federal investigations of the Chinese technology companies’ alleged violations of sanctions.

“MIT is not accepting new engagements or renewing existing ones with Huawei and ZTE or their respective subsidiaries due to federal investigations regarding violations of sanction restrictions,” Maria Zuber, MIT’s vice president for research, said in a letter posted on its website.

Zuber also said the institute’s collaborations with China, Russia and Saudi Arabia will face additional administrative review procedures.

“The Institute will revisit collaborations with these entities as circumstances dictate,” she