Bulgarian police have clashed with protesters who are trying to blockade the parliament building, demanding that the left-leaning government resign and early elections be called.

Several hundred protesters, mostly students, tried Tuesday to form a human chain around parliament in an attempt to blockade lawmakers inside. Police are using force to try to push them away. Several people have been injured in the clashes.

The protest in Sofia was organized by students who have been occupying Bulgarian universities for several weeks. Their actions are part of a 5-month-old movement against the Socialist-led government that accuses its leaders of having ties to shady businessmen.

Protesters halted busy traffic in central parts of the capital, Sofia.