Police describe the suspects as four black males -- two armed and all wearing ski masks at the time of the alleged crime.
Two people -- a 54-year-old man and his 21-year-old daughter -- told police they were approached by all four within the garage stairwell at the Largo station and were robbed of their personal belongings. Police believe the woman was then shot and her father struck in the head with a blunt object. Neither injury is life threatening.
Police believe two suspects fled in the victims' vehicle, which was recovered a short time later.
The other two suspects are believed to have fled in a grey 2004 Audi station wagon, with a Maryland license plate number 1DME50. This vehicle has not been recovered.
Police are also investigating an armed carjacking at the New Carrollton station Friday morning. They say the two crimes may be related.