An anticipated Tuesday morning vote on a gay marriage bill in Maryland was delayed after two supporters were no-shows, Baltimore's WBAL News reported.

Democratic Delegates Jill Carter and Tiffany Alston missed the early morning vote without explanation.

Republican members of the House Judiciary Committee heckled Chairman Joseph Vallario, who opposes the gay marriage bill, before he decided to delay the vote until later on Tuesday.

A slim majority of committee members have pledged their support for the measure.

The panel began debate on the bill last Friday, one day after the Senate gave its final approval. The Senate approved the measure with the assistance of one Republican, Senator Allan Kittleman, who joined 24 Democrats in voting for the bill.

The full House could take a final vote on the legislation by Friday.

House members appear nearly evenly split on the measure. Supporters claim they have 69 of the 71 votes needed for passage in the House, generally considered the more liberal chamber on social issues.

Opponents of gay marriage have mounted a vigorous campaign to derail the bill.