Updated: 5:47 p.m. - 

Reports say the three-year-old is being transported in serious condition to Children's Hospital. Both adults also left the scene in ambulance, being taken to Mount Auburn Hospital. 

Updated: 5:44 p.m. - 

Reports all vicitims are out of the water and in the hands of medics. Firefighters are all accounted for and decontaminating from Spy Pond

At approximately 5:30 p.m. we received reports that a three-year-old child and two adults have fallen through the ice in the area of Linwood Street at Spy Pond. Firefighters are reportedly in the water now and EMS is heading to the scene.

Arlington Patch will bring you more information as it becomes available.