The death toll in the New York gas leak explosion has risen to four, officials confirmed.
Seventy four people were injured and others are missing after two buildings collapsed following a gas leak explosion in Harlem, NBC New York reported.
"This is a tragedy of the worst kind because there was no indication in time to save people," the city's mayor, Bill de Blasio said.
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A second police officer has died after he and a colleague were shot as they scuffled with a suspect in Florida.
Thousands of demonstrators have marched through Boston in opposition to a right-wing rally in the city which was eventually cut short.
Some 1,000 counter-protesters blocked 500 neo-Nazi demonstrators as they tried to march to the site of the death of Hitler ally Rudolf Hess.