North Carolina politicians have voted to roll back North Carolina's "bathroom bill" in a bid to end the backlash over transgender rights that has cost the state dearly in business projects, conventions and basketball tournaments.

Floyd Mayweather has denied claims a mega showdown with Manny Pacquiao has been finalised but hopes the fight can come to fruition.

An explosives-sniffing dog died after he fell more than 50 feet during a security sweep to prepare for a US professional basketball game.

Amy Westfeldt, New York

Police in the US have stepped up security at airports, subways and hotels after the country was put on heightened terrorist alert and law enforcement officials indicated New York was a possible target.