 She in turn accused them of stirring up trouble ahead of elections to the Saint Petersburg Legislative Assembly scheduled for 11 March, of criticising the city's perceived dynamic development and for allegedly receiving financial support from dubious sources.On 15 April 2007, the Dissenters' March took place in Saint Petersburg for the second time.On 19 May 2007, the Federal Security Service of the Russian Federation announced that on 16 May it had detained several members of an undisclosed youth religious group allegedly preparing an assassination attempt on Valentina Matviyenko’s life using hand grenades and plastic explosive.