Thousands of protesters have urged Bulgaria's Socialist-led government to resign during a rally in Sofia.
Police said on Sunday that about 15,000 people took part in a rally outside the government building in the capital Sofia to demand a new election. Protesters also gathered outside parliament and in other Bulgarian cities.
Prime Minister Plamen Oresharski's decision to appoint 32-year-old media mogul Delyan Peevski as chief of the powerful national security agency DANS and parliament's rapidity in rubber stamping the nomination angered many people.
Many waved Bulgarian flags and shouted "Mafia!", "Resign!", and "Red garbage!" in what amounted to the biggest rallies in the past three days.
Thousands poured into the streets in protest, sparking fears of a fresh political crisis, just months after anti-poverty demonstrations brought down the previous government.
President Rosen Plevneliev demanded an immediate review of the appointment and said he had lost confidence in the government.
Peevski offered to step down from the post on Saturday and Oresharski said he accepted the resignation.
But protesters were not appeased.