As if Senate Majority Leader Mitch McConnell weren’t miserable enough...

LONDON — One of the busiest stations on London’s subway system was evacuated Friday morning after a train carriage filled with smoke.

London’s fire department said that crews were investigating “smoke issuing at platform level” at Oxford Circus station.

Passenger Tom Singer tweeted a photograph of smoke filling a carriage of a Bakerloo Line train at the station. Another photo posted by Joe Bunting showed passengers in a smoky subway car covering their mouths and noses.

British Transport Police said its officers were on the scene but the cause “is not currently being treated as suspicious.”

Passengers say staff ordered everyone to leave just before 9 a.m. (0800 GMT) Friday.

There were no immediate reports of injuries.