The SNP leader and First Minister of Scotland, claimed Scotland was being treated with “contempt” by Westminster.
She tweeted: Right behind @IanBlackfordMP and @theSNP MPs.
“Scotland and @ScotParl are being treated with contempt by Westminster and it needs to be highlighted.”
Mr Blackford was trying to force a vote to secure Scottish devolution, demanding the house sat in private to carry out the vote, sparking chaos in the Commons.
Speaker of the House of Commons, John Bercow, advised the vote should be carried out after PMQs but was repeatedly shouted down by SNP MPs.
It forced Mr Bercow to “withdraw” Mr Blackford from the House, sparking a mass walk out.
The stunt means Mr Blackford can’t enter the House for the rest of the day.
MPs also erupted into laughter after another SNP MP was called upon to ask Theresa May a question, but was no where to be seen, having just stormed out.
The heated exchange began when Mr Blackford told Theresa May the results of yesterday’s votes on the EU Withdrawal Bill amounted to a power grab of Scottish powers.
He said: “The Prime Minister said she would treat Scotland as a union of equals but last night she pressed ahead with a power grab of Scotland’s elected parliament. The Prime Minister silenced Scotland’s voice, plunging it into constitutional crisis.”
The Prime Minister replied: “Only the SNP could say getting 80 areas where they make decisions is a power grab.
“His real questions should be why is it the Labour Party used procedural manoeuvres to sure there was no debate about the amendments referring to Scotland.”
Mr Blackford said: “I really do hope the people of Scotland listen very carefully to what the Prime Minister says.
“The reality is the powers enshired under the Scotland Act 1998 are being grabbed back. The MPs from Scotland were not even given the courtesy of discussing it. It’s a democratic outrage.
“The people of Scotland will not be disrespected by the Parliament.
“Given the disrespect shown I have no option but to ask this house now sits in private.”
The unprecedented move challenged the Speaker, with John Bercow, who was repeatedly forced to shout “order” at raging MPs, to advise the vote be conducted after PMQs.
Mr Bercow said: “I hope he will trust me. There will be a division at end of this session and not now.
“Resume your seat Mr Blackford!
“Don’t tell me what the procedures of this house are. There can be a vote at the end of this session. Mr Blackford, no!
“Under the power given to me in light of persistent and repeated refusal for the Right Honorable Gentleman to resume his seat, I order him to withdraw immediately from the house for the remainder of this day’s sitting.”
Outside on College Green, Mr Blackford said he wasn’t trying to boycott Parliament.
He said: “Our voices are not being heard. I want to be in parliament to make sure our voices can be heard.”
Mrs Sturgeon added: “The Tories couldn’t have made it any clearer today that they have no respect for @ScotParl. Never again will the line that Scotland is an equal partner in Westminster system be believed.
“The decision to act without our consent, and the manner of doing it, will not be forgotten.”
The chaos was dismissed as a stunt by opposiiton MPs.
Alberto Costa, a Conservative MP for South Leicestershire, from Scotland, said the SNP were using Brexit to push for a second independence referendum.
He said: “This is embarrassing for Scotland.”
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