Jordan's army says the country's air force has attacked cars that were at the kingdom's border with neighboring Syria.
An army statement says the attack happened Wednesday at 10:30 am. The statement says the camouflaged vehicles were driving in a rugged area near the border and ignored demands to stop from security forces.
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The statement says Jordanian warplanes fired warning shots at the vehicles. The statement says the vehicles didn't stop and were then destroyed in airstrikes. The statement did not say how many vehicles were destroyed, nor did it offer casualty figures.
Jordanian state television reported the airstrikes without elaborating.
Jordan's armed forces routinely arrest smugglers trying to cross its desert border with Syria, but such airstrikes are rare.
Syrian military airstrikes killed at least four people early Wednesday in a rebel-held town along the Lebanese border, activists said, as pro-government forces intensify their campaign against some of the last rebel strongholds on a valuable supply line.
The shelling hit rebels on the edge of the town of Zabadani and wounded 10 people, said Rami Abdurrahman of the Britain-based Syrian Observatory for Human Rights. He and a Damascus-based activist Ammar al-Hassan said the strike came during intensified shelling of the town.
Zabadani is in a part of Syria protruding into the Bekaa Valley in eastern Lebanon. The town and nearby Madaya are on the Qalamoun frontier with Lebanon, areas that once served as opposition supply routes to nearby rural Damascus.
Syrian forces, bolstered by fighters from the Lebanese Shiite militant group Hezbollah, systematically took back most other rebel-held towns along the mountainous frontier in a campaign that began in November.
On Wednesday, Syrian forces loyal to President Bashar Assad took the town of Housh Arab, the state-run SANA news agency reported. It fell after pro-Assad forces took the nearby town of Arsal al-Ward on Tuesday.
Rebels still hold the town of Talfita in Qalamoun, but it is now surrounded by Assad-held territory.
Al-Hassan said those in Zabadani helped smuggle wounded fighters into the nearby Sunni Lebanese town of Majdal Anjar, some 15 kilometers (9 miles) away, and allowed rebels to smuggle supplies through the town.
"From the days of the peaceful protests of the revolution, it was a chief smuggling place and it remains that way," al-Hassan said.
Still, al-Hassan and another activist Akram al-Shami said while they expected Assad forces to retake Zabadani, government-backed forces face difficult conditions.
"They have to cross a lot of valleys and mountains," al-Shami said.