CAIRO, April 29 (Reuters) - Qatar is asking for 5 percent interest and an 18-month maturity on $3 billion in bonds it has offered to buy from Egypt, an Egyptian official involved in the negotiations said on Monday.

Qatari Prime Minister Sheikh Hamad bin Jassim al-Thani promised the money during a visit to Qatar by Egyptian Prime Minister Hisham Kandil on April 10. The Gulf state had already lent Egypt $5 billion since President Mohamed Mursi took office last July.

The Egyptian official, who asked not to be named, said no agreement had yet been reached on the bonds.

(Reporting by Patrick Werr; Editing by Paul Taylor)

((patrick.werr@thomsonreuters.com)(+20-2-2578-3290)(Reuters Messaging: patrick.werr.thomsonreuters.com@thomsonreuters.net))

Keywords: EGYPT QATAR/