In late May 1999, Russia announced that it was closing the Russian-Chechnya border in an attempt to combat attacks and criminal activity; border guards were ordered to shoot suspects on sight. On 18 June 1999, seven servicemen were killed when Russian border guard posts were attacked in Dagestan. On 29 July 1999, the Russian Interior Ministry troops destroyed a Chechen border post and captured an 800-meter section of strategic road. On 22 August 1999, 10 Russian policemen were killed by an anti-tank mine blast in North Ossetia, and, on 9 August 1999, six servicemen were kidnapped in the Ossetian capital Vladikavkaz.