Actor George Takei says President-elect Donald Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE is wrong to call for a more powerful U.S. nuclear arsenal.

In a tweet Thursday, Takei said nuclear weapons "must go," and said he had lost family members in the atomic attack on Hiroshima, Japan.

Trump wants to expand our nuclear arsenal. I think of my aunt and baby cousin, found burnt in a ditch in Hiroshima. These weapons must go. — George Takei (@GeorgeTakei) December 22, 2016

Takei's tweet came after Trump earlier Thursday called for growing the U.S. arsenal.

“The United States must greatly strengthen and expand its nuclear capability until such time as the world comes to its senses regarding nukes,” he tweeted.

ADVERTISEMENT

A Trump spokesman later Thursday clarified that the president-elect was addressing the need to prevent nuclear weapons from reaching unstable countries or terrorist groups.

“President-elect Trump was referring to the threat of nuclear proliferation and the critical need to prevent it – particularly to and among terrorist organizations and unstable and rogue regimes,” Jason Miller said, according to ABC News.

Russian President Vladimir Putin on Thursday, meanwhile, also urged his nation to boost its nuclear military might.

“We need to strengthen the strategic nuclear forces,” he said at Russian Defense Ministry board meeting in Moscow.

Putin noted during his remarks 60 percent of Russia’s nuclear armaments are modernized, and also encouraged his nation not to neglect its non-nuclear military capabilities.

Trump on the campaign trail proposed that countries like Japan and Saudi Arabia should acquire nuclear weapons to counter rivals like Iran and North Korea.

Such a move would run counter to current U.S. policy which seeks to restrict the proliferation of nuclear weapons. Trump's comments also come as the U.S. is expected to spend $1 trillion over the next 30 years upgrading its nuclear stockpile.