Protesters set fire to the headquarters of the ruling party in Ulan Bator July 1, 2008. Mongolians alleging election fraud clashed with police and set fire to the headquarters of the ruling party on Tuesday, and the leader of the opposition said he would not accept the projected outcome of the poll. [Agencies]

Mongolian President Nambariin Enkhbayar declared Tuesday a four-day state of emergency as protestors went on the rampage in the capital claiming that weekend elections were rigged.

"From 11:30 P.M. (1530 GMT) on Tuesday there will be a four-day state of emergency," said a presidential decree read out on state television.

The decree warned that anyone caught on the streets after the 10:00 P.M. curfew without documentation would be arrested. Public gatherings and independent media broadcasts were also banned. 

The action came after thousands of people took to the streets of the Mongolian capital Ulan Bator on Tuesday to voice their outrage at weekend elections they claim were rigged.