South Shore commuter rail service has resumed between Michigan City and South Bend follow a problem with an overhead wire, NICTD said in an alert about 2 p.m.

Passengers on South Shore trains headed into Chicago on Wednesday morning may have experienced delays because of a disruption in service between South Bend and Michigan City, an official said.

Commuters were bused between South Bend and Michigan City because of an overhead wire problem, said John Parsons, spokesman for Northern Indiana Commuter Transportation District.

Westbound trains that normally originate out of South Bend may not arrive at stops in Porter and Lake counties if buses between South Bend and Michigan City run behind, Parson said.

The rail line repaired an overhead wire problem Tuesday caused by what was believed to be a lightning strike, he said. However, another wire problem arose Wednesday.

Parsons did not have an estimate time for repairs to be completed, but said information would be posted at NICTD's website when service resumes.