Maryland Rail Commuter train service on the Brunswick and Camden lines will be altered today because of a forecast of a winter ice storm, Maryland Transportation Administration officials announced yesterday.

With freezing rain and ice accumulations expected, only MARC trains with an "S" at the top of their displays will operate. The Penn Line will operate on a regular schedule, but its runs may be reduced later depending on the path and severity of the storm, officials said.

A severe storm can potentially result in extensive delays. Information: 410-539-5000, beginning at 6 a.m. today.