Police said they were alerted after a straphanger noticed the sleeping gunman.
Shawn Howard of the Bronx attacked three people on the A and C trains, police said.
DNAinfo is collecting your images on Instagram to show the range of daily commutes.
The 1, 2, 3, 5, 6, 7, A, C, D, E, F and 42nd Street Shuttle will all be affected.
The muggers fled at Columbus Circle, police said.
MTA is modifying service on 1, 2, 4, 6, A, C, D, E, L, N and R over the weekend, so plan accordingly.
The 2, 3, 4, 5, 6, 7, A, C, D, E, F, L, Q, R and 42nd Shuttle will all be impacted.
The 2,3,4,5,6,7,A, F, L, Q and S trains will be affected by the modifications, MTA says.
Trains along several subway lines were disrupted because of a power outage, officials said.
The 4, 5, 6, 7, A, C, E, Q and the 42nd Street shuttle will be disrupted this weekend.
Bloggers and filmmakers with "Internets Celebrities" highlight food on the A line in "Food Warriors."
The sign is part of the agency's campaign aimed at reminding riders of subway etiquette.
The 4, 5, 6, 7, A, C, E, F, N, Q and R lines are slated for service changes.
The 2, 6, A, D, G, N, Q and R lines are slated for service disruptions.
The 2, 4, 6, A, D, E, G, N, Q and R lines are all slated for service changes this weekend.
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