The victim chased the accused thief underground from station to station.
A person was taken to Bellevue Hospital after being struck by a B train Thursday, officials said.
The suspect and the victim had been riding the G train together on Jan. 26.
Signal problems disrupted the 1, 2 and 3 subway lines in most of Manhattan, the MTA said.
The assault happened Christmas Eve at the Queens Plaza station, police said.
The renovation of the Dyckman Street station replaced the platforms and added a new elevator and ramp.
A person was rushed to Bellevue Hospital after tripping and hitting a train, the FDNY said.
An empty suitcase prompted 1, 2 and 3 trains to temporarily bypass Times Square Monday, police said.
The disruption came just hours after major Metro North problems left commuters stuck.
The officer was attacked at the Hoyt-Schermerhorn subway station near the Fulton St. Mall, police said.
More than a foot of snow fell on parts of the city, the National Weather Service said.
An unattended package on the a platform in Grand Central disrupted rush-hour commutes, the MTA said.
Three women sprayed a substance into the face of a straphanger and then robbed her, police said.
The three men approached the victim on the C train inside the Franklin Avenue station, the NYPD said.
The man was hit by the southbound train in the Myrtle-Wyckoff station about 9:30 a.m., the MTA said.
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