The West Concourse of Penn Station will be closed from 10 a.m. Wednesday until before the evening rush hour Thursday, the Long Island Rail Road said.

LIRR customers were advised to use the Exit Concourse and the Central Corridor to the east of the West End Concourse for platform access at Penn Station, the railroad said in an electronic alert Wednesday morning.

At street-level, the railroad asked people to use the entrance at 33rd Street and 7th Avenue for access to the LIRR, Amtrak and New Jersey Transit.

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The closure was due to “ongoing construction,” the railroad said.

It was unclear if the construction was related to the planned track repairs scheduled to begin in a few weeks at the hub.