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(Reuters) - Tropical Storm Chris is expected to develop to hurricane strength on Tuesday, the U.S. National Hurricane Center (NHC) said in its latest advisory.

The storm was about 210 miles (340 km) south-southeast of Cape Hatteras, North Carolina with maximum sustained winds of 70 miles per hour (110 km/h), the Miami-based weather forecaster said.

Chris is expected to gain additional strength on Wednesday, the NHC said.