DUBAI- Oman has tightened the price guidance for a two-part U.S. dollar-denominated bond issuance comprising seven- and 12-year bonds and received over $3.4 billion in orders for the debt sale, according to a document seen by Reuters, in the Gulf state's first international bond issue this year.

The document, issued by one of the banks leading the deal, showed Oman tightened the guidance to a yield of 6.75-6.875% for the seven-year tranche and 7.375-7.5% for the 12-year tranche. It began marketing them in the 7.0% area and 7.625% area respectively.

(Reporting by Yousef Saba; Editing by Kevin Liffey) ((Yousef.Saba@thomsonreuters.com; +971562166204))