The BBC is reporting that George Burgess, the director of the Florida Program for Shark Research, has confirmed that multiple species were involved in the attacks off of Egypt’s Sharm el-Sheikh. Burgess went on to say that attempts to hunt down the sharks involved in the attacks was pointless, due to the fact that the research team investigating the attacks have already ruled out the possibility of a “rogue shark.”

Burgess was also quoted as saying the attacks were “undoubtedly” the result of environmental factors, but that the investigation into these factors was still ongoing.

Despite Burgess’ assessment of the futility of hunting down the sharks involved, The Washington Post reports that Governor of South Sinai Mohammed Shousha is claiming that a shortfin mako shark (Isurus oxyrinchus) caught and killed last week was responsible for two of the attacks. Shousha went on to say, “the search for the oceanic whitetip continues.” An oceanic whitetip (Carcharhinus longimanus) is believed to be the species involved in the other attacks, including the fatal attack on a German tourist.