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BETHESDA, Md. (WUSA) -- An early morning traffic headache on the Inner Loop of the Capital Beltway in Bethesda escalated to a full-blown migraine after drivers sat in traffic for hours.

State police said at approximately 7:45 a.m., however, that the lanes of the Inner Loop between Old Georgetown Road and Route 355/Rockville Pike were reopening.One lane of eastbound I-495 before to Route 355/Rockville Pike is open at Route 187. Two left lanes are open at Route 355/Rockville Pike, says the Metropolitan Area Transportation Operations Coordination via Twitter. There are delays for 6 miles.

Maryland State Police responded to the scene of two separate collisions involving tractor trailers, which blocked all lanes of the Inner Loop between Old Georgetown Road and Route 355/Rockville Pike. Police say the first crash happened shortly before 1:00 Friday morning when a tractor trailer crashed into a guardrail, causing a fuel leak. Around 4:40 a.m., the driver of a second tractor trailer approaching the accident scene slammed on the breaks, causing the vehicle to jack-knife on the opposite side of the roadway from the original crash. This secondary collision caused another fuel spill.

Maryland State Police officials said fuel from both vehicles had be drained, which was described as a "lengthy process," before the trucks could be removed.

At approximately 7:35 a.m., state police said the first tractor trailer was loaded onto a wrecker. Approximately 10 minutes later, the second tractor trailer was cleared.