Orange Line service was delayed Wednesday morning as transit police spent about 20 minutes interviewing witnesses and searching for a man who allegedly made verbal bomb threats while on board a train. The southbound train was stopped at Back Bay Station.

MBTA spokesman Joe Pesaturo told Boston.com that a suspect was taken into custody shortly after noon.

Police were told the man who made the threats had been wearing a mask, according to Pesaturo.

BREAKING: Law enforcement are questioning #MBTA passengers after someone called saying they'll "blow up the T". pic.twitter.com/yPJDzmlXXt — Only In Boston (@OnlyInBOS) September 16, 2015

The busiest MBTA stations: