UPDATED: 4:01 p.m.: Sigh. The deer rescued from the Cambridge Reservoir now has been put down, says Fox News. Good try, guys.
UPDATED, 12:40 p.m.: Crews have brought the deer to shore, according to the 7 News chopper.
UPDATED, 12:20 p.m.: Crews have reached the deer and are bringing him toward the shore, according to the 7 News helicopter over the scene.
UPDATED, 11:58 a.m.: Waltham firefighters reported one of the deer at the Cambridge Reservoir is dead, and the other is alive waiting to be rescued.
UPDATED, 11:35 a.m.: Firefighters are about to enter the reservoir in rescue suits to attempt to rescue the two deer, according to WBZ-TV's Bree Sison's Twitter feed.
UPDATED, 11:17 a.m.: According to Waltham Dispatch's Twitter feed, the deer at the Stony Brook Basin has been freed, but authorities are responding to two additional deer on the ice at the Cambridge Reservoir.
Waltham firefighters are responding to reports of a deer falling the through the ice at the Stony Brook Basin off of Turner Street, according to scanner reports.
Firefighters are searching for a place to launch a rescue boat and have spotted the animal 20 feet from the shore, according to scanner reports.
The Deputy Fire Chief and Animal Control Officers are on the scene along with Massachusetts Environmental Police and the Animal Rescue League, according to scanner reports. Weston firefighters have been called to the scene with a rescue boat.