September 23, 2016 11:05 am What's Causing a Bird Die-Off in Portland, Maine? Officials in Portland, Maine, are perplexed after three dozen sea gulls have been found dead at a 55-acre public park in the city in less than a month’s time. US & World Videos 1:56 20-year-old killed, teen critically hurt in Northbridge double stabbing 1:02 Bruins fans hyped after Game 7 OT win over Maple Leafs 0:33 Paperwork filed to charge student accused of school shooting threats in Milton 1:50 Man found shot to death in Taunton shed 0:49 Bowling alley reopens 6 months after mass shootings in Lewiston, Maine