Sinn Fein leader Gerry Adams said the shootings at military barracks were wrong and were an attack on the Northern Ireland peace process.
The MP said the perpetrators had no support and he urged party members to help the police investigation.
"Last night's attack was an attack on the peace process. It was wrong and counter productive," he said.
"Those responsible have no support, no strategy to achieve a united Ireland. Their intention is to bring British soldiers back onto the streets.
"They want to destroy the progress of recent times and to plunge Ireland back into conflict."
Mr Adams stated that Irish republicans and democrats had a duty to oppose violence and to defend the peace process.
"There should be an end to actions like the one in Antrim last night. The popular will is for peaceful and democratic change.
"Sinn Fein has a responsibility to be consistent. The logic of this is that we support the police in the apprehension of those involved in last night's attack."
Mr Adams appealed to republicans for calm, thoughtful and decisive leadership.
"The peace process was built against the odds and not least because of the willingness of republicans to take risks and to be strategic and long-sighted."
The MP claimed there are elements within Unionism and within the British government 'who do not want the peace process to achieve its objectives'.
"Our responsibility is to defend the peace process and the progress that has been made to achieving national and democratic rights.
"We will not be deflected from our republican and democratic objectives," he added.