KHARTOUM, May 4 (AFP) -- Libya has proposed a draft constitution for a tripartite union of Libya, Sudan and Egypt, a press report said here Sunday.

The proposal came during Saturday's brief visit by Sudanese President Omar al-Beshir to Tripoli, the official SUNA news agency quoted Foreign Minister Mustafa Ismail as saying.

The Libyan side led by President Moamer Kadhafi put forward for discussion with the Sudanese delegation headed by Beshir a draft constitution for unity of the two countries and Egypt, Ismail said.

The Sudanese promised to give its viewpoint on the matter after thoroughly studying the draft constitution, he added.

The minister said the two leaders had a closed-door meeting and a plenary one during the unscheduled visit in which they discussed the peace process in Sudan and the security situation in west Sudan's Darfur region.

The two leaders discussed the current tension in relations between Sudan and Eritrea but "did not concentrate on this issue as it was not one of the objectives of the visit," said Ismail, denying a meeting between Beshir and Eritrea's Issaias Afeworki, noting that the latter was not in Libya.

The two sides also discussed the bilateral cooperation and integration agreements and related projects, said Ismail.