This story was updated at 4 p.m. Oct. 15, 2013.
A man was stabbed Thursday at the Twinbrook Metro station in Rockville.
The stabbing took place at about 10 a.m., said Cpl. Rebecca Innocenti, a Montgomery County police spokeswoman.
Montgomery County police responded, but Metro Transit Police took over the investigation, she said.
Morgan Dye, a Metro spokeswoman, said the man was stabbed once in the side. The assault took place outside of the station entrance, she said.
Rescue personnel took the man, who has not been identified, to a local hospital, she said.
The investigation is ongoing, she said. Metro Transit Police are reviewing footage and looking for two people, she said.
On Tuesday, she said Metro Transit police were continuing to work with local jurisdictions and following up on tips.