Egyptian authorities yesterday released 163 members of the banned Muslim Brotherhood who were among hundreds detained in a crackdown on the opposition movement during May protests, a judicial source said. Police arrested hundreds of Muslim Brotherhood members during the protests for political reform and then jailed hundreds more in later demonstrations calling for the release of those held. An Interior Ministry source said 486 people were still being held for ties to the Brotherhood.They include leading members of the group, which like other opposition groups says recent political reform by the government aims to secure power for the incumbents rather than allow more competition. The Brotherhood says a constitutional amendment replacing the old referendum on a single candidate for the post of president with a system allowing multi-candidate elections in fact aims to bar it from fielding a candidate.