A 19-year-old man and a juvenile were arrested Thursday evening and charged with robbing two women in separate incidents in Northeast Washington, according to D.C. police.

Police said the first incident occurred about 5 p.m. in the 5300 block of James Place NE, a few blocks off Eastern Avenue. Officer Araz Alali, a D.C. police spokesman, said a man approached a juvenile female as she was unloading a car and demanded her keys.

Alali said the girl screamed and struggled with the man, who got the keys but not the car. Police said the robber got into a purple Dodge Caravan with two other men inside and sped off.

About 9 p.m., Alali said a man with a gun robbed a woman walking in the 3400 block of Southern Avenue, near the Capitol Heights Metro station. It is about 1 1/2 miles away from the earlier incident.

Police said the gunman took the woman’s purse, a red Coach wallet and a cell phone.

Alali said the two robberies are related and that 19-year-old Nick Savoy of Northeast was charged with one count of robbery and one count of robbery while armed. A D.C. Superior Court judge ordered him detained until his next hearing; a date has not yet been set, according to on-line court records. A second suspect arrested was a juvenile, Alali said.

D.C. police reported making arrests in 10 robberies this week, several involving cell phones. In one case, police said robbers took a man’s Nike shoes and his groceries.

Police also reported two armed carjackings on Friday. One occurred about 5:10 p.m. when a man armed with a gun took a woman’s 2007 Toyota Camry from 53rd and East Capitol streets Southeast. Police were searching for three men. Another carjacking was reported about 4 a.m. at 34th Street and Benning Road Northeast. Police said a black 2002 Toyota Avalon was taken.