The California Supreme Court’s decision on whether to strike down Proposition 8, which banned gay marriage in the state, could come as soon as Tuesday.

The judges have until June 3rd to make their decision. The court usually only rules on Mondays and Thursdays, although will be issuing rulings on Tuesday as Monday is the Memorial Day holiday.

There has been speculation that the ruling may be issued today, but the court normally gives 24 hours notice of announcements.

According to reports, barricades have been put up in the Castro district of San Francisco, and around the California Supreme Court building.

Proposition 8 banned gay marriage in California in November 2008 but the California Supreme Court is now considering whether to overturn the ban. The judges have until June 3rd to come to a decision.

Supporters of gay marriage have argued that Prop 8 is unconstitutional and discriminatory as it defines marriage as being between a man and a woman.

The issue is over whether a voting majority can overrule minority rights previously recognised by the court, as it had previously declared that gays and lesbians have a constitutional right to marry.