Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: Please enable Javascript to watch this video 
  
 Grainy, poor-quality surveillance footage showing the slow gait of a large cat-like animal walking along a street in densely populated Norwalk has created a mystery. 
  
 At first, the person who saw the animal early Tuesday thought it was a mountain lion, but that theory has been discounted by state wildlife officials, City Manager Jeff Hobbs said Friday afternoon. 
  
 The California Department of Fish and Wildlife's "undisputed expert" determined the animal shown in the video is not a cougar, Hobbs wrote in an email headlined "'That's No Mountain Lion,' Says CA Dept Fish & Wildlife Expert." 
  
 "Department officials still cannot definitively identify the type of animal. They will continue to investigate," Hobbs wrote. 
  
 A mountain lion sighting was reported about 3:45 a.m. in the 11000 block of Tina Street (map), according to a Los Angeles County Sheriff's Department lieutenant. That's the time shown in the video footage, dated Tuesday. 
  
 The densely populated residential area not far from the junction of the 5 and 605 freeways is some 20 miles from typical foothill mountain lion habitat. 
  
 The footage, which shows an animal with a large, curving tail, was posted on the city's Facebook page Friday. 
  
 A lion expert told the Los Angeles Times the animal in the footage resembled an African lion. 
  
 State game warden Don Nelson, who examined the video for the state wildlife department along with predator ecologist Becky Pierce, told the Times he thought the video showed a "large older dog, maybe a pit bull or part pit bull." 
  
 A representative of the California Department of Fish and Wildlife visited the neighborhood where the animal was spotted to speak to residents about what to do if they see the animal again, Hobb said. 
  
 Sheriff's Department patrol was elevated in the area, he added. ||||| Is it a lion? 
  
 A dog? 
  
 A Chupacabra? 
  
 Residents in Norwalk, California, are jittery over reports of an African lion possibly roaming the streets. 
  
 So far, only grainy security images of the mysterious creature have emerged, showing the animal prowling along the sidewalk. 
  
 California Department of Fish and Wildlife experts studied that footage. The cat-like animal is not a mountain lion, authorities determined. 
  
 “Department officials still cannot definitively identify the type of animal,” authorities said. “They will continue to investigate.” 
  
 Norwalk Mayor Marcel Rodarte is intrigued by the creature’s appearance. 
  
 “The tail doesn’t seem to match up to the physical traits of a mountain lion, so it is still a mystery,” Rodarte said. 
  
 Authorities with a local zoo claimed all the big cats are accounted for. 
  
 A similar lion scare occurred last year in Virginia -- but that ominous animal turned out to be a bizarrely-coiffed labradoodle named Charles the Monarch. While dog-grooming tricks can confuse people from time to time, the gait of the mystery beast in California has residents concerned. 
  
 “We’ve got dogs and my sister got another little dog, so we’re all just making sure everybody keeps their pets inside,” resident Elizabeth Colon said. |||||
Output:
Surveillance video of ... something ... strolling around Norwalk, California, is becoming the city's "version of Bigfoot," reports the LA Times. State officials don't think the creature in the grainy video is a mountain lion, reports KTLA, but they're not hazarding a guess about what it might be. Among the possibilities getting tossed around: an African lioness, a big pit bull, a leopard, or some kind of big-cat hybrid. "It's still a mystery," the mayor tells ABC News. The animal was captured on video walking across somebody's driveway at 3:44am. "If a lion is out there like that, it shouldn't be happening," says the director of a local big-cat sanctuary. (The hunt for Bigfoot isn't going so well, either.)