The former security guard set for international debut after famously taking the wicket of Steve Smith with his first ball in Test cricket in January
The gunman reportedly dressed as Santa Claus shot dead a policeman and a civilian at the entrance to the Reina nightclub, one of the city's most exclusive party venues, before going on a shooting rampage inside, according to the authorities.
NTV television said many party-goers threw themselves into the Bosphorus in panic after the attack and efforts were under way to rescue them from the waters.
"The United States condemns in the strongest terms the horrific terrorist attack at a nightclub in Istanbul, Turkey, which has left dozens dead and many more wounded," National Security Council spokesman Ned Price said in a statement.
"That such an atrocity could be perpetrated upon innocent revelers, many of whom were celebrating New Year's Eve, underscores the savagery of the attackers."
Price added: "We reaffirm the support of the United States for Turkey, our NATO ally, in our shared determination to confront and defeat all forms of terrorism.
State Department deputy spokesman Mark Toner said the United States would be "in close touch" with Turkish authorities as they investigate the attack.
"Sadly, this heinous attack is only the latest effort to kill and maim innocent civilians," he added.
"These attacks only reinforce our strong determination to work with the Government of Turkey to counter the scourge of terrorism."
The former security guard set for international debut after famously taking the wicket of Steve Smith with his first ball in Test cricket in January
Mohammed Fattah Al Burhan Rahmane was riding his motorbike in Ankara in March when he collided with a utility vehicle
Those who do not have permits will be directed to return to their point of origin, the Directorate of Public Security said
Nijjar, 45, was shot dead outside a Sikh temple on June 18 in Surrey, a Vancouver suburb
The two-time Grand Slam champion, who won the US Open in 2022 and Wimbledon last year, turns 21 on Sunday
Turkish president says the move is also aimed at increasing the amount of humanitarian aid entering Gaza
In another case at the same airport, officials apprehended five foreign nationals who tried to smuggle gold worth Rs.24.4 million
More than 2,000 pro-Palestinian protesters arrested in the past two weeks across the US