According to Nassau County Police, there were two fatal car crashes on Peninsula Boulevard on Sunday.
The identities of those involved in the crashes have not been released yet.
The first of the two occurred at around 4:00 a.m., when a 20-year-old man lost control of his vehicle, a 2010 Nissan Altima, while driving southbound on Peninsula Boulevard, and crashed into several trees.
A 20-year-old woman was pronounced dead on the scene.
The driver and another passenger, a 32-year-old woman, were transported to a nearby hospital and are reported to be in critical condition.
The second crash occurred at around 10:35 p.m., close to the Southern State Parkway, on Peninsula Boulevard. Similar to the first crash, the driver — a 24-year-old male driving a 2006 Mini Cooper — lost control of his vehicle and hit a tree.
A male passenger in his 20s was pronounced dead on the scene, and the driver is reported to be in critical condition.
Police investigations for both crashes remain ongoing.
Peninsula Boulevard is not officially a highway, but it has a higher speed limit than many areas of Nassau County at 45 miles per hour.