UPDATED | The New York City subway will see your shark and raise you two kittens.

Runaway felines were the cause of Thursday's extended outage on the B and Q lines in Brooklyn, as subway workers tried to catch the two kittens who had strayed onto the tracks.

Weeks after the Metropolitan Transportation Authority was moved to explain how a dead two-foot shark might have ended up on an N train at Queensboro Plaza, the agency on Thursday demonstrated its runaway cat protocol.

MTA spokesman Kevin Ortiz said a station attendant was first alerted to the presence of the cats around 11:06 a.m. by their owner, who had brought them to the Church Avenue station on subway's Brighton Line. Somehow, the cats escaped onto the tracks.

The station attendant alerted the MTA's control center, which dispatched a Train Service Supervisor. It was the supervisor who asked that third rail power be cut in the area of the station, suspending regular service from DeKalb Avenue to Brighton Beach.