By Tom Miles and Stephanie Nebehay
GENEVA (Reuters) - Russia has told the United Nations it will stop bombing eastern Aleppo for 11 hours a day for four days, but that is not enough to trigger a wider ceasefire deal under which militants would leave the Syrian warzone, the U.N. said on Thursday.
The Syrian military said a unilateral ceasefire backed by Russia had come into force to allow people to leave eastern Aleppo, a move rejected by rebels who say they are preparing a counter-offensive to break the blockade.
"They (the Russians) have said 11 hours per day and four days from today, Thursday," U.N. Syria humanitarian adviser Jan Egeland told reporters. "We hope it can be four days from tomorrow Friday."
"They are considering that additional day," he said, noting that Russia had originally announced an 8-hour pause, but the U.N. had objected that it was too short to evacuate wounded and bring in assistance.
Russia did not announce the four days of pauses. But its defence ministry said President Vladimir Putin had ordered the first 11-hour pause, which was due to expire on Thursday afternoon, to be extended for a further 24 hours.
The Syrian army, supported by Iranian-backed militias and Russian air power, announced a major offensive to capture the rebel-held part of Aleppo on Sept. 22, unleashing firepower not previously seen in the 5-1/2-year long war.
The onslaught has killed several hundred people and flattened many buildings. Hospitals have also been hit, leading the United States and France to accuse Russia and the Syrian government of war crimes.
In New York, United Nations Secretary-General Ban Ki-moon pushed on Thursday for the 193-member General Assembly to hold a rare emergency special session on Syria since a deadlocked Security Council has failed to take action to end the nearly six-year war.
Russia has vetoed five Security Council resolutions on Syria since 2011. An emergency special session of the General Assembly could adopt a resolution on Syria recommending action.
In Brussels, European Union leaders were considering a draft text on Thursday that would condemn the attacks by the Syrian and Russian military and threaten further sanctions on individuals and entities if they continue. Russian Foreign Minister Sergei Lavrov and U.S. Secretary of State John Kerry discussed the Syrian crisis by phone on Thursday, the Russian foreign ministry said in a statement.
Separately, Turkish air strikes pounded a group of Kurdish fighters allied to a U.S.-backed militia in northern Syria overnight, highlighting the conflicting agendas of NATO members Ankara and Washington in an increasingly complex battlefield.
The Syrian military said in a statement it would bring down any Turkish war planes which entered the country's airspace.
THINGS CAN GO WRONG
Russia has said it stopped bombing Aleppo because it expects fighters from the banned Jabhat Fateh al-Sham group, previously called the Nusra Front, to leave the city, under a ceasefire deal proposed by U.N. Syria envoy Staffan de Mistura.
But de Mistura said he regarded the pauses in the bombing as a response to the U.N. request for medical evacuations.
His ceasefire proposal required more.
"The package is clear, Nusra needs to declare they are ready to go, or others can do on their behalf, and at the same time that there is a commitment by the (Syrian) government to respect the local administration," he said.
"Let's separate the two things. Today we consider this a medical evacuation, or medical support. The next steps are part of a larger package that needs to be there."
Egeland said he hoped the first sick and wounded would be brought out on Friday to government-held western Aleppo or rebel-held Idlib, according to their choice.
"We hope to continue until we have been able to evacuate all of the cases that need such evacuation, and that would be hopefully done in the course of days, and it could be several hundred cases with their families."
U.N. aid convoys are ready to move from western Aleppo and from Turkey, but there was still no deal to get food into the besieged zone and no guarantee that all would go smoothly.
"This is Syria, so everything can go wrong at every possible opportunity," Egeland said.
De Mistura said there were "perhaps 6,000-7,000" rebel fighters in eastern Aleppo, apparently revising an estimate two weeks ago in which he said there were 8,000 rebels there, including up to 900 members of Jabhat Fateh al-Sham.
(additional reporting by Jack Stubbs, Christian Lowe, Jan Strupczewski, Ece Toksabay, Lisa Barrington, Angus McDowall and Michelle Nichols; Editing by David Stamp and Cynthia Osterman)