Lake Buena Vista, Florida (CNN) Alligator warning signs will be put up near all the waterways at Walt Disney World resorts following the death of a 2-year-old boy who was dragged into a lagoon two nights ago, a senior source at Disney told CNN on Thursday. "We are conducting a swift and thorough review of all of our processes and protocols," Walt Disney World Resort Vice President Jacquee Wahler said in a statement Thursday. "This includes the number, placement and wording of our signage and warnings." The Graves family was at a movie night outdoors Tuesday night at the Grand Floridian resort when the boy waded into about a foot of water in Seven Seas Lagoon, authorities have said. Witnesses, including the boy's horrified parents, tried to save him as a gator dragged him underwater, witnesses told authorities. Search crews combed the water for hours before they found the toddler's body. A source with knowledge of the situation told the Orlando Sentinel that the resort would put up more explicit signs warning about the gators. One employee said he had told management at the Grand Floridian the area should be fenced off. Disney beaches closed 
 
 By midmorning Wednesday, Disney had closed all beaches in its resort area "out of an abundance of caution" after the attack, a Disney representative said. A community mourns 
 
 The boy's parents, Matt and Melissa Graves of Elkhorn, Nebraska, issued a statement on Thursday. Disney has "no swimming" signs along the beaches at its hotels. Unprovoked alligator attacks in Florida (1948-2016) 257 The number of attacks that required medical care 23 People who died as a result of those attacks 8 Number of children (16 and under) among the 23 deaths 1977 The year that saw the most attacks requiring medical care (13) 1 in 2.4 million The likelihood of a resident being seriously injured in an attack Source: Florida Fish and Wildlife Conservation Commission (as of April 2016) 
 
 As of April, only one other major alligator attack had been reported in the state this year, according to the Florida Fish and Wildlife Conservation Commission.
– The family of Lane Graves, the 2-year-old killed by an alligator at Walt Disney World on Tuesday, released a statement Thursday, staying it's "devastated" by his death. "Words cannot describe the shock and grief our family is experiencing over the loss of our son," ABC News quotes Matt and Melissa Graves as saying in the statement. They offered their "deepest gratitude" to authorities and staff who worked to find their son after the attack. The family was hanging out on the beach at Seven Seas Lagoon near Disney World's Grand Floridian Resort when Lane was grabbed by an alligator and dragged underwater. His body was found Wednesday. On Thursday, the medical examiner announced Lane died from drowning and traumatic injuries, CNN reports. Disney also released a statement Thursday, promising to install alligator warning signs. “We are conducting a swift and thorough review of all of our processes and protocols," the Orlando Sentinel quotes the statement as saying. "This includes the number, placement, and wording of our signage and warnings." The only warning signs currently placed around the Seven Seas Lagoon read "no swimming please." Since the attack on Lane, a number of tourists have come forward about seeing alligators at Disney World. Disney was sued in 1986 after an alligator bit a child at its Fort Wilderness campground.