Protesters in Guinea burned down two police stations in the central region on Tuesday, the AFP news agency reports, quoting witnesses and government sources.
The West African country is engulfed in unrest over suspicions that President Alpha Condé wants to change the constitution in order to seek a third term. He has been president since December 2010.
The security ministry released a statement on Tuesday saying protesters pelted the two police stations in the city of Pita with stones before burning them down, the AFP reports.
It quoted an anonymous eyewitness who said some protesters took advantage of the chaos to steal guns and food supplies from a police station.
Security forces shot dead two protesters on Monday at the start of the open-ended protests.
Previous demonstrations against Mr Condé have been broken up by security forces leading to at least 20 deaths.