Two people injured, one critically, after two separate motorcycle crashes on I-15 northbound near Las Vegas.

All lanes of northbound Interstate 15 reopened about 8:45 a.m. Monday after three hours of delays near the Charleston Boulevard exit.

Nevada Highway Patrol responded to two separate crashes involving motorcycles on I-15 near Charleston about 5:45 a.m., said a state trooper, which resulted in lane closures for northbound I-15.

One person sustained life-threatening injuries and was taken to University Medical Center, Elliott said.

By 8:45 a.m., all lanes were reopened.