DES MOINES, Iowa — The U.S. Postal Service said Monday its decision to halt the closing of more than 3,700 post offices includes roughly 600 urban and suburban postal branch offices and satellite stations.

The facilities in many cities serve as neighborhood post offices. The Postal Service announced last year that it was looking at closing up to 252 mail-processing centers and 3,700 post offices, many of them in rural areas, as part of a plan to save some $6.5 billion a year.

It backed off the plan to close the 3,700 post offices last week, saying it would no longer close thousands of rural post offices but would keep them open with shorter hours.

The mail agency on Monday reiterated that about 600 branches and satellite stations in urban and suburban locations that had been included in the original study for closure also will be kept open, rather than shut down after today.

The Postal Service has said it will also put forward a new plan for the mail processing centers later this week. The Postal Service last week reported a quarterly loss of $3.2 billion.