Transit Police and BPD stepping up patrols at subway stations after Port Authority attack

There is no credible threat against Boston or the sprawling MBTA transit system, but in the wake of the bombing in New York City, law enforcement is stepping up patrols on the T and around the city, officials said Monday.

MBTA Transit Police Superintendent Richard Sullivan said he contacted the Joint Terrorism Task Force along with state and local law enforcement agencies in the wake of the bombing in a transit tunnel connecting the Port Authority and Times Square subway stations.

“At this time, there is no information – credible or otherwise to suggest that the MBTA is a target,’’ Sullivan said. “That being said, we will have high visibility coverage at high volume stations and will have additional EDU teams deployed through the system.’’

Sullivan urged commuters to contact Transit Police if they see something amiss. Transit Police have an application available for both Apple and Android phones, he said.

“We’d like to remind our riding public – if they see something, say something,’’ he said.

Separately, Boston police tweeted that top commanders are monitoring the current incident in #NewYorkCity & continues contact w/ #NYPD.’’

The department tweeted that “although there does not appear to be a specific threat to the Boston area at this time, the #BPD has stepped up patrol near major @MBTA stations & reminds officers to remain vigilant.’’

New York Police tweeted that one man was in custody following the 7:30 a.m. explosion.