Turkey-Syria earthquake death toll passes 28,000 as rescue hopes dwindle.

 Unrest in southern Turkey has disrupted rescue efforts in some places following Monday's deadly earthquake, three rescue groups have said.

The death toll in Turkey and Syria from the quake has surpassed 28,000, and hope of finding many more survivors is fading despite some miraculous rescues.

German rescuers and the Austrian army paused search operations on Saturday, citing clashes between unnamed groups.

Security is expected to worsen as food supplies dwindle, one rescuer said.

Turkey's president said he would use emergency powers to punish anyone breaking the law.

An Austrian army spokesperson said early on Saturday that clashes between unidentified groups in the Hatay province had left dozens of personnel from the Austrian Forces Disaster Relief Unit seeking shelter in a base camp with other international organizations.

"There is increasing aggression between factions in Turkey," Lieutenant Colonel Pierre Kugelweis said in a statement. "The chances of saving a life bears no reasonable relation to the safety risk."

Hours after Austria paused its rescue efforts, the country's ministry of defence said that the Turkish army had stepped in to offer protection, allowing the rescue operations to resume.