Chelsea Manning, the Army specialist who served seven years in prison for crimes related to leaking hundreds of thousands of military and diplomatic files to WikiLeaks, has been denied temporary entry to Canada, according to a letter she published on Twitter.

The letter appears to be the official Canadian denial of an application to visit the country. The letter states that Manning had sought to cross the border in Saint-Bernard-de-Lacolle, Quebec.

Manning is deemed "inadmissible" due to Canadian law barring those "having been convicted of an offense outside Canada that, if committed in Canada, would ... [be] punishable by a maximum term of imprisonable of at least 10 years."

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"so, i guess canada has permanently banned me ?" tweeted Manning with a series of emojis appearing depict a Mountie denying her passage.

"@CitImmCanada denied entry b/c of convictions similar to 'treason' offense," she added.

so, i guess canada has permanently banned me ? ✋ @CitImmCanada denied entry b/c of convictions similar to "treason" offense pic.twitter.com/xp0JOEEOGd — Chelsea E. Manning (@xychelsea) September 25, 2017

In subsequent tweets, Manning wrote that she would challenge the decision on the grounds that laws for which she was convicted were not sufficiently similar to Canadian treason laws.

Manning was imprisoned in 2010 after leaking more than 700,000 documents to WikiLeaks, including diplomatic cables, a video of an airstrike in Baghdad and other files. She was sentenced to 35 years in prison but granted clemency by President Obama in 2016.