Hundreds of Afghan university student protest in Jalabadad - the latest in a wave of violent demonstrations against a film that mocks the Prophet Mohammad.
Protesters chant anti-American slogans.
They also burn a U.S. flag -- and set fire to an effigy of U.S. President Barack Obama.
On Tuesday, Afghan militants claimed responsibility for a suicide bomb attack on a minibus carrying foreign workers that killed 12 people - saying it was in retaliation for the film.
The 13-minute English-language video, which was filmed in California, portrays the Prophet Mohammad engaged in crude and offensive behaviour.
In Islam, any depiction of the Prophet is generally regarded as blashephemous.
