NEW : Bahrain 's crown prince says security is not negotiable and calls for dialogue . Riot police appear to shoot a man point blank with tear gas , a video shows . About 5,000 university students demonstrate against the government . Comment:
NEW : Bahrain 's crown prince says security is not negotiable and calls for dialogue . Riot police appear to shoot a man point blank with tear gas , a video shows . About 5,000 university students demonstrate against the government . It 's one of several protests in Bahrain Sunday , eyewitnesses say .