The Free Syrian Army moved its command center from neighboring Turkey into a part of Syria that the rebel fighters described as “liberated,” while human- rights activists said President Bashar al-Assad’s forces killed dozens of people in intensified shelling and airstrikes.

Troops clashed with rebels near the town of Nasib along the border with Jordan, the Associated Press reported. Jordan’s border guards arrested militants early today after an exchange of gunfire, the state-run Jordanian news agency Petra reported.

United Nations envoy Lakhdar Brahimi, who was appointed to revive the UN’s peace efforts in Syria, said the crisis could spread regionally if the bloodshed isn’t contained, according to a Sept. 20 interview with Al Arabiya television. More than 26,000 people have died since the conflict between Assad’s opponents and the military began in March 2011, the U.K.-based Syrian Observatory for Human Rights said.

The Free Syrian Army’s command center is now in one of the “liberated areas” of Syria, FSA Commander Colonel Riad al- Assad said in a video aired by Doha-based Al-Jazeera today. He didn’t give the location or details of the facility.

About 80 Syrians, including rebels and members of the government’s forces, were among those killed today, the Syrian Observatory said. Nineteen people died as troops shelled the city of Aleppo, while 27 were killed in the suburbs of the capital, Damascus, the opposition Local Coordination Committees said in an e-mail today. Assad’s military also shelled and broke into homes in the towns of Deir al-Zour Daraa, Idlib, Raqqa and Hama, leaving scores of casualties, the group said.

Syria’s official news agency, SANA, reported today that troops destroyed one of the headquarters of “terrorists” in Aleppo, killing 20 people and injuring 10.

To contact the reporter on this story: Dahlia Kholaif in Kuwait at dkholaif@bloomberg.net

To contact the editor responsible for this story: Shaji Mathew at shajimathew@bloomberg.net