Cell phone service resumed in two of four busy New York commuter tunnels on Monday after it was shut off amid heightened security concerns following last week's deadly blasts in London, officials said.

Cell phone service to two of the tunnels had been shut down in a miscommunication between the New York Police Department and the Manhattan Transportation Authority, officials said. Service to those two tunnels was restored.

No specific reason had been given for the move to stop service on Thursday after the London blasts, which killed more than 50 people, but cell phones have been used to trigger bombs in the past.

In March 2004 bombs in Madrid that killed 191 people on trains were fitted to mobile phones, using the alarms as timers. Police in London have said they believe the subway bombs there were detonated by timers.

A New York Police Department spokesman said police had not requested the shutdown of service in the Midtown Tunnel, which connects Manhattan and the borough of Queens, and the Battery Tunnel between Manhattan and Brooklyn.

In announcing the resumption of service, the Manhattan Transportation Authority said, "It appears to be a miscommunication between the NYPD and the MTA."

Cell phone service in the Holland and Lincoln tunnels, which go under the Hudson River to connect Manhattan and New Jersey, remained suspended on Monday.

The Port Authority of New York and New Jersey, which oversees the Lincoln and Holland tunnels, said it did not consult police before deciding to shut down service in the interest of safety last week.

"We have not opened the frequencies up for cell phones," a Port Authority spokesman said. "We did not consult the NYPD. We did it on our own and are continuing to evaluate the situation."

New York has remained on high alert for another attack following the Sept. 11, 2001, hijacked plane attacks, which destroyed the World Trade Center's twin towers.


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