In Bahrain, one policemen was killed and another injured when gunmen attacked a prison yesterday. <br/><br/>Interior Ministry said in Manama that around six men, armed with automatic rifles and pistols, attacked the Jaw prison, south of the capital Manama and freed 10 inmates. <br/><br/>It said, a security lockdown has been imposed around Jaw prison. Sporadic unrest has hit Bahrain since protests in February 2011 demanding an end to discrimination against the Shia majority by the Sunni Muslim rulers. <br/><br/>The unrest left at least 30 civilians and five policemen dead. Almost 3,000 people were also arrested, and scores were handed long prison terms by military courts.