Washington (CNN) WikiLeaks announced in a tweet Wednesday the Senate Intelligence Committee called on its founder Julian Assange to testify on Russian interference in the 2016 election.

"US Senate Intelligence Committee calls editor @JulianAssange to testify. Letter delivered via US embassy in London. WikiLeaks' legal team say they are 'considering the offer but testimony must conform to a high ethical standard,'" the tweet said.

The tweet also included a copy of the letter delivered to Assange.

BREAKING: US Senate Intelligence Committee calls editor @JulianAssange to testify. Letter delivered via US embassy in London. WikiLeaks' legal team say they are "considering the offer but testimony must conform to a high ethical standard". Also: https://t.co/pPf0GTjTlp pic.twitter.com/TrDKkCKVBx — WikiLeaks (@wikileaks) August 8, 2018

It requests Assange make himself "available" for a closed interview with the committee "at a mutually agreeable time and location," and to respond as soon as he receives the letter.

Spokespeople for Senate Intelligence Committee Chairman Richard Burr, R-North Carolina, and the top Democrat, Mark Warner of Virginia, declined to comment on the letter.

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