Donald Trump has urged Intel CEO Lip-Bu Tan to resign immediately, citing concerns over Tan’s investments in companies linked to the Chinese military. Tan, who joined Intel earlier this year to help revive the company, has faced criticism from Republican lawmakers over national security risks, according to BBC.

Intel defended Tan, stressing their commitment to US security and ongoing domestic investments. Experts believe Trump’s attack may also relate to tensions over Intel’s US manufacturing plans.

Following Trump’s comments, Intel’s shares fell more than 3 percent. With US chip production a key priority, industry watchers say stable leadership is vital for Intel’s future growth, BBC reported.