SEMINOLE COUNTY, Fla. -- The body of a missing boy with autism has been found in a pond near the boy's Seminole County home. 

• Body of boy with autism found in pond
• Humza Syed went missing Saturday night
• Syed wandered away from his home

Humza Mohammed Syed, 7, went missing after he wandered away from his home on Ridgemount Place in Lake Mary at about 8:30 p.m. Saturday. 

Authorities say Syed was being watched by his 24-year-old brother and his 16-year-old brother. 

The 24-year-old said he noticed the garage door open but didn't think anything of it at the time. Moments later he said he began to search the home for his little brother and noticed Syed was gone. 

The Seminole County Sheriff's Office began to search for the boy, along with neighbors. Nearly 100 people helped look for Syed. 

Crews found boy's body in Lake Sawyer, which they had spent hours searching the night before, authorities say. 

Wandering from home is common for children on the autism spectrum. News 13 was told Syed was known to run when he was afraid. Finding a child with autism once they've wandered off can be challenging because many are startled by strangers or dogs used to track them down. 

According to a study by the American Academy of Pediatrics, nearly half of all children with autism will run away and potentially go missing at least once before their 17th birthday. 

Authorities say Syed was missing for close to 12 hours before his body was found.