HOBOKEN - (AP) - Policymakers in Mayor Michael Bloomberg's administration have been discussing whether to extend the No. 7 subway line under the Hudson River between New York City and New Jersey.

A plan for a new commuter rail tunnel under the river was recently scuttled by New Jersey's Republican governor, Chris Christie.

A spokesman for the deputy mayor for economic development tells The New York Times that extending the No. 7 "could address many of the region's transportation capacity issues."

But spokesman Andrew Brent said the idea is still "in its earliest stages."

The estimated $5.3 billion plan circulated by the city's Hudson Yards Development Corporation calls for running the No. 7 line from Manhattan's West Side to Secaucus.