The United States said on Sunday that it officially withdrew from the Open Skies Treaty, in yet another move to abandon a major international arms control agreement.

“Today marks six months since the United States submitted our notice of withdrawal from the Treaty on Open Skies”, - National Security Adviser Robert O’Brien said in a tweet.

The Trump administration submitted the notice of its decision to withdraw from the treaty in May, and the Sunday announcement marked the end of a six-month notification process.