One thousand pro-Russian activists seized and occupied the Security Service of Ukraine (SBU) building in the city of Luhansk on 6 April 2014, following similar occupations in Donetsk and Kharkiv. The activists demanded that separatist leaders who had been arrested in previous weeks be released. In anticipation of attempts by the government to retake the building, barricades were erected to reinforce the positions of the activists. It was proposed by the activists that a "Lugansk Parliamentary Republic" be declared on 8 April 2014, but this did not occur. By 12 April, the government had regained control over the SBU building with the assistance of local police forces.