Ukraine crisis: Kiev presidential office 'abandoned'

In Ukraine, Kiev's presidential offices are unguarded, with opposition protesters apparently in full control of the government district, say BBC correspondents.

Opposition leaders say President Yanukovych, whose whereabouts are unknown, must stand down immediately.

A political pact was signed on Friday by Mr Yanukovych and opposition leaders, agreeing to hold elections by the end of the year.

Duncan Crawford, reporting from Kiev, said people who had been inside the government compound told him the presidential offices were abandoned.