The Nevada Highway Patrol sent an alert over Twitter just after 6:50 p.m. Traffic tgoward Las Vegas remain stopped as of 4:15 a.m.

Police work the scene of a fatal officer involved shooting south of Primm on I-15 North, Wednesday, Jan. 8, 2020. (Rachel Aston/Las Vegas Review-Journal) @rookie__rae

Police work the scene of a fatal officer involved shooting south of Primm on I-15 North, Wednesday, Jan. 8, 2020. (Rachel Aston/Las Vegas Review-Journal) @rookie__rae

Police work the scene of a fatal officer involved shooting south of Primm on I-15 North, Wednesday, Jan. 8, 2020. (Rachel Aston/Las Vegas Review-Journal) @rookie__rae

The suspectÕs car at the scene of a fatal officer involved shooting south of Primm on I-15 North, Wednesday, Jan. 8, 2020. (Rachel Aston/Las Vegas Review-Journal) @rookie__rae

Police work the scene of a fatal officer involved shooting south of Primm on I-15 North, Wednesday, Jan. 8, 2020. (Rachel Aston/Las Vegas Review-Journal) @rookie__rae

Motorists are stuck on I-15 North ahead of where the police are working the scene of a fatal officer involved shooting south of Primm on I-15 North, Wednesday, Jan. 8, 2020. (Rachel Aston/Las Vegas Review-Journal) @rookie__rae

Police are blocking the northbound lanes of Interstate 15 near Primm on Thursday, Jan. 9, 2020, in Las Vegas. (Ellen Schmidt/Las Vegas Review-Journal) @ellenkschmidt_

The northbound lanes of Interstate 15 are closed due to police activity near Primm on Thursday, Jan. 9, 2020, in Las Vegas. (Ellen Schmidt/Las Vegas Review-Journal) @ellenkschmidt_

Police investigate the suspect's vehicle in an incident that resulted in the northbound lanes of Interstate 15 being closed near Primm on Thursday, Jan. 9, 2020, in Las Vegas. (Ellen Schmidt/Las Vegas Review-Journal) @ellenkschmidt_

UPDATE: The northbound lanes of I-15 remained closed as of 4:15 a.m. Thursday. There is no word when traffic toward Las Vegas will resume.

North Interstate 15 at Primm is closed Wednesday night because of police activity.

The Nevada Highway Patrol sent an alert over Twitter just after 6:50 p.m. that both directions had been closed./

#breaking ⚠️ I-15 at Primm/Stateline closed in both directions due to police activity. Avoid the area. #nhpsocomm — NHP Southern Command (@NHPSouthernComm) January 9, 2020

Just after 8 p.m., NHP said southbound I-15 had reopened to traffic, while northbound remained closed.

#trafficupdate I-15 southbound at Primm/Stateline is now open, northbound traffic is still closed. #nhpsocomm — NHP Southern Command (@NHPSouthernComm) January 9, 2020

The Nevada Department of Transportation advises seeking an alternate route.

Contact Tony Garcia at tgarcia@reviewjournal.com or 702-383-0307. Follow @TonyGLVNews on Twitter.