Quneitra Crossing, Golan Heights:
Syrian rebels on Thursday briefly seized the only crossing along the Israel-Syria ceasefire line on the Golan, before regime forces recaptured it using tanks, an AFP correspondent and Israeli sources said.
The fighting took place at the Quneitra crossing and the nearby village of the same in the demilitarised zone between the Syrian part of the strategic plateau and the Israeli-occupied sector.
The clashes were very close to the headquarters of a UN peacekeeping force, prompting Austria to announce it was withdrawing its troops and throwing the mission into disarray.
"The Syrian army has recovered control of the crossing," an Israeli security source told AFP, speaking on condition of anonymity.
An AFP correspondent near the crossing also confirmed that forces loyal to President Bashar al-Assad had retaken Quneitra, saying he could see regime tanks moving inside the area.
Quneitra is the only crossing point between Syria and the Israeli side of the Golan Heights which the Jewish state seized during the 1967 Six-Day War and later annexed in a move never recognised by the international community.
The Israeli military earlier confirmed that the crossing and the nearby town of the same name had fallen into rebel hands.
"We can confirm that opposition forces have overrun the town of Quneitra and the border post," said Captain Arye Shalicar.
Following the clashes, in which two UN peacekeepers were slightly injured, Austria announced it was withdrawing its 380 troops from the UN Disengagement Observer Force (UNDOF) which has been monitoring the ceasefire line since 1974.
"The Austrian army's participation in the UNDOF mission can no longer be maintained for military reasons," an official statement said, indicating the threat to its soldiers had "reached an unacceptable level."
Defence Minister Gerald Klug said the withdrawal would take between two and four weeks and could begin as soon as Tuesday.
The pullout will have a significant impact on the size of the UN peacekeeping force, whose numbers dropped to around 900 in March after Croatia became the latest country to withdraw its soldiers, following similar moves by Canada and Japan.
Austria's Foreign Minister Michael Spindelegger telephoned UN leader Ban Ki-moon to tell him of the withdrawal, said UN spokesman Martin Nesirky.
"The secretary general is concerned about the potential consequences of such a withdrawal on the peacekeeping operation and also on regional security and in that regard, he regrets the decision that has been taken," Nesirky added.
UN peacekeeping spokesman Kieran Dwyer told AFP that talks were underway with other countries about sending troops to the Golan force.
Israel has long feared that the violence could force UNDOF to completely pull out, leaving the ceasefire zone open to infiltration by hardline militants.
"We appreciate the contribution and commitment of the Austrian forces to keeping the peace in the Middle East over the years, however we regret this decision, and express hope that it will not lead to an additional escalation in the area," the Israeli foreign ministry said.
Thursday's flareup prompted Israel to reinforce its military presence on the plateau, public radio said.
Although the army refused to confirm the report, AFP correspondents reported seeing tanks on flatbed trucks in the Quneitra area.
And Israel also lodged a formal complaint with UNDOF over the entry of regime tanks into the demilitarised zone as they moved to retake Quneitra.
During the morning, two badly wounded Syrians were let in through Quneitra and taken to Ziv hospital in the Galilee town of Safed.
It was not clear whether they were rebels, government troops or civilians, but Ziv hospital said that a "live hand grenade" had been found on one of them, sparking a brief security scare.
"The grenade was found as doctors treated a seriously wounded and unconscious person," a hospital statement said.
"When they began removing his clothes they found the live grenade in his pocket."
The area of the trauma room and the operating theatre were both evacuated but the grenade was quickly defused by bomb disposal experts, it said.
Several dozen Syrian civilians tried to pass through the Quneitra crossing to escape the fighting but were turned back by the Israeli army, Israeli media reported.
Syria remains formally at war with Israel and Quneitra crossing is used almost exclusively by Druze residents from the Israeli-occupied side who are allowed to cross over to study, work or get married.
Israel controls some 1,200 square kilometres (460 sq miles) of the strategic plateau, while around 510 square kilometres remain in Syrian hands.