( CNN ) -- Those probably were not UFOs that hovered over China recently , a Massachusetts Institute of Technology analyst said . The images of the UFOs have caused quite a stir in China and on blogs around the world . But many of the images appear to be faked with the software program Photoshop and the ones that were not faked seem to depict the launch of a Chinese ballistic missile , said Geoffrey Forden , an MIT weapons analyst . Forden , who also specializes in Russian and Chinese space systems , published his analysis on a blog called `` Arms Control Wonk . '' In the analysis , Forden used scientific theories to examine the images of the flying object that he felt were not created with Photoshop . `` It seems to me that a DF-21 ( missile ) launch somewhere near Jiuquan and aimed at a point somewhere in the eastern Gobi desert is the most likely cause of this 'UFO ' '' , Forden wrote . Chinese officials have been looking into the reports about UFOs . They have said they were trying to determine whether the objects were private or military aircraft , rocket flares , reflection in the sky or something else . The first sighting occurred at Hangzhou 's Xiaoshan Airport , in the eastern part of the country , according to the state-controlled Xinhua news agency . Eighteen flights were delayed or rerouted and operations shut down after twinkling lights were spotted above the terminal around 9 p.m. July 7 , the agency said . According to Xinhua , speculation has centered on a private aircraft . The state-run China Daily quoted a source saying the object had a military connection . Purported photos of the unworldly object have appeared online , on YouTube and on television news shows . Meanwhile , The Shanghai Daily reported a UFO appeared above the city of Chongqing a day later .
Some have said they saw UFOs over China recently . Images of the flying objects have popped up on the Internet . MIT analysis said many of the images are fake .