Concessions offered by the beleaguered government of Egyptian President Hosni Mubarak were rejected as opposition leaders demanded on Monday for the immediate end of his 30-year rule as demonstrations calling for his ouster entered their 14th day, which has rattled this North African nation.

Also, the prospect of a quick end for Mr Mubarak's regime appears not much an appeal for its close ally, the United States, which regards the Egyptian leader's continuing hold to power as a crucial balancing force in the region.

US President Barack Obama has acknowledged that the tide of changes engulfing Egypt could prove irreversible at this time but he warned too that a hasty departure for the current government may not be the ideal scenario.

Mr Obama reminded that the Egyptian leader, when he offered concessions to quarters wishing his rule's demise, is presently aware that leadership change in his country is a certain prospect but he must be given the appropriate leeway since Mr Mubarak has already pledged that he's "not running for re-election and his term is up this year."

Meantime, analysts said that the supposed negotiations between Egyptian Vice President Omar Suleiman and the country's opposition groups appear to produce no breakthroughs apart from the mutual agreement of forming a body that would "study and propose constitutional amendments and required legislative amendments."

The talks included the banned but popular Muslim Brotherhood but excluded opposition leader Mohamed ElBaradei, who later commented in an interview that the negotiation process has been blurred by vague intentions of the government and stressed that "if you really want to build confidence, you need to engage the rest of the Egyptian people, the civilians."

Analysts said that the biggest stumbling block in the negotiations is the adamant demands of protestors for a sweeping and immediate change of government, which is a prospect both unwelcomed by Mr Mubarak and Mr Suleiman.

On her part, US Secretary of State Hillary Clinton merely echoed the sentiments of Mr Obama when she asserted on Monday that the exit of the current Egyptian government clearly relies on the wishes of the majority of Egyptians though she cautioned that a too early or forced departure for Mr Mubarak could only generate more complications.