A senior leader of al-Qaida in Yemen has criticized beheadings by Islamic State (IS) fighters as un-Islamic, and said his own group had banned such acts.IS, an offshoot of the al-Qaida network, has carved out territory in Syria and Iraq with military victories over government troops and former Islamist allies and violence against civilians. Its fighters sometimes film their beheadings of prisoners and post the footage online."There is no doubt that some of our brothers have been influenced by scenes of beheadings which have proliferated lately," Nasser bin Ali al-Ansi, of al-Qaida in the Arabian Peninsula (AQAP), said in video posted on Twitter, without referring to Islamic State by name."These are scenes which we do not accept and we strongly reject," he added."Prophet Mohammad, peace be upon him and upon his family, has ordered us to be kind in everything, even in killing, and it is not part of kindness to film beheadings and slayings and publish them in public, where sons and daughters of those killed can see," he added in Arabic."These are some of the ugliest matters."