Eight soldiers died in a rebel attack on a checkpoint near the citadel in the centre of Homs, the Observatory said.
On the same day, a rebel attack north-east of Bujumbura left four people - including one Hutu rebel - dead, according to a government official.
Army convoys supplying Aleppo have come under repeated rebel attack.
Al-Assad's government regularly has used its aircraft to attack rebel positions.
They were among a group who fled across the border into Iraq at the weekend to escape an attack by rebel fighters.
The Burmese army has launched a fresh attack on rebel Kachin forces in the north of the country, breaking a short-lived government ceasefire.
Rebel soldiers launched a surprise attack in Homs on Sunday morning, in an attempt to retake the Baba Amr district which was overrun by pro-Assad forces a year ago.
UNITA. But, had the war lasted a few years more, he would have become a rebel soldier, obliged to attack people, such as his mother, living in government-held towns.
Louay Almokdad, a rebel spokesman, confirmed the attack to The Associated Press by phone and said the extent of the injury meant that amputation was likely, though he had not received confirmation it had been carried out.
But the rebel spokesman said he believes that attack was also set up by the government.
The FSA's al-Kurdi said the attack was coordinated by rebel brigades.
CNN: Syria shows al-Assad, amid speculation on his whereabouts
While Ban told reporters at the United Nations he was aware of the rebel claims of a chemical weapons attack by the government, he did not say whether those claims will also be investigated.
The attack killed 25 people, including rebel leader Raul Reyes, four Mexicans and an Ecuadorian.
The attack killed 25 people, including rebel leader Raul Reyes, four Mexicans and an Ecuadorian, reports said.
Mr Jerbo was chief of staff of SLA-Unity rebel group at the time of the 2007 attack but is currently in the Justice and Equality Movement group, the ICC says.
BBC: Darfur war crimes suspect rebel Jerbo 'killed in Sudan'
But a spokesman for the rebel Free Syrian Army told CNN he believes the attack was staged by the government.
An American intelligence official told me that he had learned of the purported attack, and others, by monitoring rebel Web sites.
Wednesday's attack was by far the most daring rebel exploit in the decade-long history of the conflict in Russia's would-be breakaway republic.
The latest ELN attack comes as Colombia's largest rebel group, the Farc (Revolutionary Armed Forces of Colombia), holds peace talks with the government, aimed at ending five decades of an armed conflict that has killed an estimated 600, 000 people.
The attack on Saturday came a day after a rebel group threatened a new insurgency and following a shooting incident in Tetovo.
Damascus says rebel forces used chemical weapons, but rebel commanders have accused government forces of carrying out the attack, citing reports of victims suffering breathing difficulties and bluish skin.
But Monday's attack is seen as a sign that Muslim rebel groups continue to have a presence in northern Chechnya, which is largely more pro-Russian than southern areas of the territory.
But some other rebel commanders say it's unclear who was behind the attack.
CNN: Syria shows al-Assad, amid speculation on his whereabouts
"We are fighting Iran, Russia, the party of the devil and the regime, " a Qusayr rebel commander, identified as Abu Ali, said after the attack in a video interview posted online by an activist network called the Qusayr Media Center, making a play on the name Hezbollah, or Party of God.
Manas said he was "not sure" who had carried out the attack on shepherds in Jharkhand since there were a number of splinter rebel groups in the state.
The attack was provoked, according to this resident, by a series of rebel attacks Friday evening against government checkpoints on the edges of the neighborhood.
The attack occurred just hours before a European Union human rights mission flew into the rebel region to check on the human rights situation in the war-torn republic.
This in turn might lead the Sudanese government to renew its support for the Lord's Resistance Army (LRA), a bizarre cross between a religious cult and a rebel movement based across the border in northern Uganda, which abducts children and makes them attack Ugandan government forces and civilians.
The footage, shot by the humanitarian group Free Burma Rangers, shows attack helicopters firing on the ground and jets flying close to the area of the rebel Kachin Independence Army.
Last week, Syrian rebel spokesman Louay al Mokdad claimed opposition fighters had captured an unexploded canister from an alleged chemical weapons attack.
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