Nissan carjacked at gunpoint in Jersey City, police say

JERSEY CITY - A 2005 Nissan Sentra was carjacked from its occupant at gunpoint shortly after 10 a.m. yesterday morning on Linden Avenue near Ocean Avenue, police say. The 39-year-old nephew of the vehicle's owner was looking for something in the glove compartment when he was approached by three men in their late 30's or early…