Warning shots were fired outside the presidential palace in Kabul Wednesday, where thousands of people are protesting the gruesome beheadings of seven Shiite Hazaras, Afghan police said. 

"Warning shots have been fired in the air, the demonstrators are dispersing, nobody has been injured," Kabul's deputy police chief Sayed Gul Agha Rohani told AFP. He did not clarify who had fired the shots or why.