A man from Philadelphia and a man from Delaware were killed this morning in a crash when one of the drivers went the wrong way on the Blue Route,  triggering a chain reaction that involved a sedan, a minivan and two tractor trailers.

The 3:42 a.m. crash shut the northbound lanes through to 7 a.m., snarling commuter traffic. The heavily-traveled road was closed northbound from exit 5 through exit 9 in Marple Township, Delaware County.

The crash occurred when a gold, Oldsmobile Royale driven by the man from Philadelphia was traveling south in a northbound lane and struck a green, Chevrolet Venture minivan driven by a Delaware City, Del., man, according to a Pennsylvania State Police report.  Police did not release the ages or identities of either driver.

The drivers of the two tractor trailers - a Mack and a Volvo - attempted to avoid the crash but swerved into the vehicles. Neither truck driver was injured.

The cause of the crash is still under investigation.

Contact the Breaking News Desk at BreakingNewsDesk@philly.com.