What I saw was this: the protestors threw rubbish at the mounted police on Ibn Gvirol _after_ one of the horses kicked a woman. Otherwise they were not aggressive towards the police. Some were trying to hand out flowers to the police. Many were singing "Policeman, you too are worth more", or some such sentiment.
Saudis warns U.S. that 9/11 responsibility law would erode investor confidence in America (Reuters)