Update, 10:12 p.m.: Police identified the two persons killed as Mohammed Hossain, 22, of West Lawn, Pa., and Judith Shinogle, 49, of Southeast Washington. Sgt. Paul Brooks said Hossain was driving the minivan and Shinogle the SUV.

Orginal Post: A fatal crash forced authorities to close the Baltimore-Washington Parkway for three hours Sunday morning, U.S. Park Police said.

The wreck occurred about 6:30 a.m., when a minivan traveling south crossed the median and slammed into a northbound sport utility vehicle near the exit for Maryland Route 193 in Greenbelt, Park Police Sgt.Paul Brooks said. The driver of the sport utility vehicle was killed, and the driver of the minivan was critically injured. That driver was rushed to a nearby hospital, Brooks said. No one else was injured.

Brooks said the southbound lanes of the parkway were reopened at about 9:30 a.m., and he expected the northbound lanes to open within the next hour. For more information, you can follow Brooks on Twitter.