More than 150 anti-capitalist protesters brought disruption to parts of Edinburgh today in a demonstration against G8 leaders. A strong police presence was in place in the centre of Scotland's capital city amid fears that the demonstration - named the Carnival for Full Enjoyment - could erupt into violence. On Princes Street, Edinburgh's main shopping thoroughfare, police surrounded a group of 30 to 50 protesters. The demonstrators had been blaring horns and banging drums, to which officers responded by sounding their sirens and encircling the group. Other protesters, meanwhile, were allowed to continue marching down Princes Street under police escort. Earlier, officers had searched protesters and removed their masks. A Lothian and Borders police spokesman said there had been only one arrest in connection with the demonstration.