Update, 11:22 a.m.:

Three separate crashes occurring within minutes of each other in Virginia were responsible for snarling traffic on Interstate 95 early Wednesday morning, authorities said.

According to Virginia State Police, the first collision happened around 5:45 a.m. in the northbound lanes of I-95, where congestion had slowed traffic to a stop just south of Exit 148/Quantico. Police said a station wagon failed to stop in time and rear-ended a car that had already come to a full stop. A motorcycle then rear-ended the station wagon, they said.

The motorcyclist was thrown from the motorcycle and collided with a tractor-trailer, police said.

Meanwhile, the motorcycle slid in the opposite direction into another northbound lane, where other vehicles attempted to avoid hitting it. This resulted in a three-car chain reaction crash, police said.

The only person injured in the crashes was the motorcyclist, an adult man. He was transported by medevac helicopter to Inova Fairfax Hospital with life-threatening injuries. His name has not been released pending notification of his family, police said.

The driver of the station wagon, identified as 47-year-old Sandra T. Wilson of Ruther Glen, Va., has been charged with following too closely, police said.

Update, 9:57 a.m.:

Traffic continues to move slowly through I-95 in Virginia, hours after a serious crash closed all northbound lanes.

At their peak, backups extended more than 15 miles. Though the roadway is no longer jammed, vehicles currently traveling north on I-95 through Stafford County are facing residual delays.

Authorities continue to urge drivers to avoid the area.

Update, 8:19 a.m.:

A second incident is compounding earlier delays on northbound I-95 in Stafford County, Va.

A three-vehicle crash is slowing traffic at Exit 143, near the ramp to Route 610. Cars are getting by, but there are severe delays.

An earlier collision at Exit 148, five miles north, closed the northbound lanes of I-95 during the first part of the morning rush. Drivers are advised to avoid the area, if possible.

Update, 7:44 a.m.:

As drivers continue to crawl through traffic on I-95 North in Stafford County, authorities are releasing information about the serious, multi-vehicle crash that shut down the highway earlier in the morning, triggering the delays.

According to Virginia State Police, the crash happened around 5:45 a.m. in the northbound lanes of I-95, just south of Exit 148/Quantico.

One person was transported from the scene by helicopter with life-threatening injuries, police said. No additional information has been released.

Update, 7:05 a.m.:

All northbound lanes of I-95 have re-opened, but significant delays remain.

Original post, 6:17 a.m.:

The northbound lanes of Interstate 95 are closed in Northern Virginia following a serious crash.

The crash happened near mile marker 147, just before the Quantico exit. Only the right shoulder is getting by.

A Medevac is headed to the scene, but no details about the crash or possible victims were immediately available.