Democratic Unionist Party MP Nigel Dodds has been taken to hospital after falling ill.
The Democratic Unionist MP for the area, Iris Robinson, described the murder as "an horrific attack".
Councillor Moore won a 26 to 25 vote against a Democratic Unionist Party nominee.
BBC: News | UK Politics | Rival NI parties to share top jobs
Meanwhile, the Democratic Unionist Party has described the latest move by the IRA as "a stunt".
Even Ian Paisley, leader of the hardline Democratic Unionist Party, has not gone that far.
The Ulster Unionist Party and Democratic Unionist Party have also taken their seats despite opposition to some reforms.
But Mr McGuinness' nomination has outraged the leader of the anti-agreement Democratic Unionist Party, the Rev Ian Paisley.
The former Ulster Unionist MLA, Fred Cobain, has left the party and joined the Democratic Unionist Party (DUP).
East Belfast Democratic Unionist MP Peter Robinson has also urged a permanent police presence in the Short Strand.
Democratic Unionist Party deputy leader Peter Robinson accused Mr Trimble of adopting "a hypocritical and cynical position" on the poll.
The Democratic Unionist Party's Ian Paisley Junior said an 'act of reconciliation' would be "surrender and gross appeasement to terrorism".
The Democratic Unionist Party may support Sinn Fein's campaign for a referendum on Irish unity, the enterprise minister has said.
The Democratic Unionist Party (DUP) leader was speaking ahead of his keynote speech to his party's annual conference on Saturday.
Early predictions that Sinn Fein and the Democratic Unionist Party would be unable to work together have proved spectacularly wrong.
At the last general election the party unseated the Democratic Unionist Party leader and Northern Ireland First Minister Peter Robinson.
Democratic Unionist Party minister Nigel Dodds has called for Sinn Fein to be excluded from Northern Ireland's newly restored power-sharing executive.
On Wednesday, politicians from the Democratic Unionist Party met Theresa Villiers to raise concerns about the treatment of former secret agents.
But Democratic Unionist Party minister Nigel Dodds called for Sinn Fein to be excluded from Northern Ireland's newly restored power-sharing executive.
The Democratic Unionist Party had told him they would sign up their nine MPs "en masse" to the new group, he said.
The Democratic Unionist Party said today's releases were "a travesty of justice".
MPs voted by 318 to 10 to back devolution after Ian Paisley's anti-agreement Democratic Unionist Party forced a vote on the transfer of power.
Democratic Unionist MP Nigel Dodds, who has campaigned for compensation for UK victims, said the Foreign Office unit was a "belated but welcome" move.
Democratic Unionist Party assembly member for Newry and Armagh Paul Berry has written to Ms de Brun's department to support the fire officers' concerns.
Eight Democratic Unionist Party (DUP) MPs have written to the Northern Ireland secretary and said a number of agents were not given adequate support.
Divisions inside his own party and the constant opposition to the agreement of Ian Paisley, leader of the Democratic Unionist Party, have weakened him.
Democratic Unionist councillor Gregory Campbell said that the organisers of Mr Clinton's visit must ensure that a repeat of the 1995 visit will not happen.
Democratic Unionist Party leader Ian Paisley was among the Northern Ireland politicians who expressed his party's condolences and gave him a letter to give to President Bush.
He said the Democratic Unionist leader, Ian Paisley, and his UK Unionist counterpart, Robert McCartney, had highlighted the victims in an attempt to promote their No campaign.
The Democratic Unionist Party (DUP), which is Sinn Fein' main partner in Northern Ireland's power-sharing coalition government, welcomed the move as "a step in the right direction".
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