WASHINGTON — Four people were taken to a Baltimore hospital after a crash on Interstate 95 Saturday morning in Howard County, Maryland, involving a tractor trailer.

Southbound lanes of I-95 between Maryland Route 32 and Maryland Route 216 were closed for several hours after a tractor overturned in the median. Witnesses told police that a woman driving her SUV erratically may have hit the big rig. Howard County Fire and EMS said all lanes were reopened as of 11 a.m. The victims were taken to Shock Trauma, said Howard County Fire and EMS spokeswoman Maria Hogg. Their conditions are unknown at this time. Officials remained on the scene for further investigation.

95 SB near Rt 216: Overturned tractor trailer, multiple patients reported. Will be an extended operation. Avoid the area if possible.

— Howard Co Fire & EMS (@HCDFRS) June 3, 2017

TRAFFIC: I-95 SB between Rts. 32 & 216 CLOSED due to crash involving overturned tractor trailer. Avoid 95 in area. cc: @WTOP @WTOPtraffic pic.twitter.com/W6F1HlinFS

— Bill Rehkopf CBS (@BillRehkopf) June 3, 2017

Below is a map of the area of the crash.