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2:30 p.m. Monday update:

The two people who died as a result of a road rage incident Sunday have been identified as 37-year-old Jose Rodriguez-Carrasco and 39-year-old Jason Dykes. Rodriguez-Carrasco was hit by the passing vehicle and killed while Dykes was killed during the road rage altercation.

12:15 p.m. update:

The northbound freeway lanes are now open, officials said.

11 a.m. update:

The incident left two people dead, CHP Officer Mike Zerfas told ABC10.

CHP was called to the scene at about 3:45 a.m. Sunday after reports of a crash. After the crash, two men got in a fight that left one of them dead, Zerfas said. Then the other man was struck and killed by a vehicle along the highway. The driver of that vehicle stopped and is cooperating with law enforcement, he said.

The northbound freeway lanes are expected to open at about 1 p.m. Sunday afternoon, according to CalTrans.

Original post:

Northbound I-5 is closed in Natomas at Arena Boulevard for police activity, according to CalTrans.

A CalTrans Facebook post says there was a fatal crash around 4 a.m. Sunday.

Here's a live traffic map from Waze: