ISTANBUL — Turkish police and the U.S. consulate in Istanbul have been hit in a string of deadly attacks starting early Monday, as the two North Atlantic Treaty Organization allies deepen their cooperation against Islamic State and Turkey intensifies its fight against Kurdish militants.

A police station in the city’s Sultanbeyli neighborhood was struck by a suicide car-bombing at about 1 a.m. local time, injuring three policemen and seven civilians, the Istanbul Police Department said in a statement. Less than six hours later, two assailants and one police officer were killed at a gunfight that erupted when the station drew fire.