DUBAI - Saudi Arabia's finance ministry sold 4.0 billion riyals ($1.1 billion) of domestic Islamic bonds in its monthly auction by re-opening an issue originally made in July, the ministry said on Monday.

It sold 2.25 billion riyals of five-year sukuk, 500 million riyals of seven-year and 1.25 billion riyals of 10-year, bringing the total issue size to 7.465 billion riyals.

(Reporting by Andrew Torchia, editing by Louise Heavens) ((andrew.torchia@thomsonreuters.com; +9715 6681 7277; Reuters Messaging: andrew.torchia.thomsonreuters.com@reuters.net))