A tractor trailer and more than 20 vehicles crashed on I-270 south in Germantown, Md. The crash has closed all lanes of the highway on Monday morning. (Pete Piringer/Montgomery County Fire)

Updated at 8:49 a.m.

All lanes along Interstate 270 south in Montgomery County have reopened after an earlier crash that involved 20 vehicles and a tractor trailer that spilled its load of rock and gravel onto the roadway.

That part of the road was shut down for two hours. Officials warned of some lingering delays.

Updated at 8:05 a.m.

Officials said three lanes of Interstate 270 south near Middlebrook Road in Germantown, Md., have reopened after a major crash that left four people injured and involved 20 vehicles, along with a tractor trailer that spilled its load of gravel and stones.

The road was closed for two hours.

Pete Piringer, a spokesman for Montgomery County Fire, said many people were evaluated by rescue personnel and four people were transported to area hospitals. Two people were considered to have trauma-level injuries, Piringer said on Twitter. None of the injuries were believed to be life-threatening, he said.

It is not known what caused the crash.

Updated at 7:27 a.m.

Two lanes of southbound Interstate 270 in Germantown, Md., have reopened after a major crash involving 20 vehicles and a tractor trailer that spilled its load of gravel and stones.

Several people were injured, including some seriously. They were transported to area hospitals.

The road was shut down for about two hours. It is not immediately clear what caused the crash near Middlebrook Road.

Updated at 7:05 a.m.


Southbound traffic is stalled Monday morning on I-270 after a multiple-vehicle crash, seen in this traffic camera. (Maryland Department of Transportation)

Interstate 270 south in Germantown, Md., part of a busy commuter highway in Montgomery County, is shut down after a major crash.

Here’s what drivers should know —

  • The crash happened on I-270 south near Middlebrook Road.
  • The delays are up to five miles.
  • More than 20 vehicles are involved, along with a tractor trailer that was carrying a load of gravel and stones and spilled its load.
  • Some people are injured, including some in serious condition. They were taken to area hospitals.

It is not immediately clear what caused the crash.

Just after 7 a.m., crews were trying to start to clear some of the debris from the roadway.

Interstate 270 runs in parts of upper Montgomery County and carries about 200,000 vehicles a day.

Updated at 6:20 a.m.

A major crash involving 20 vehicles and a tractor trailer that spilled its load of stones and gravel has shutdown the southbound lanes of Interstate 270 in Germantown, Md.

Drivers should avoid the area as there are major delays and it is not clear when the highway will reopen. The delays are at five miles and mounting.

Authorities are sending drivers along nearby routes, including Route 355 and MD 118.

No one is reported to have died but two dozen people were injured. The extent of their injuries is not known. Some patients are being classified by rescuers as trauma patients.

Original post at 5:45 a.m.

All southbound lanes of Interstate 270 are blocked after a crash.

It is not immediately know whether anyone was seriously hurt. Drivers should expect delays, which are now at three miles, authorities said.

The highway is closed near Middlebrook Road.