A Concord Coach Lines bus is seen in Bangor in this 2014 file photo. Credit: Brian Swartz

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Concord Coach Lines said it will suspend bus service throughout New England on Saturday after a former passenger tested positive for the coronavirus.

The passenger was on a Concord Coach Lines bus on four separate trips between March 11 and March 16, the state Department of Health and Human Services said Tuesday.

The Concord Monitor reports the company will continue its current schedule through Friday and will resume service “once the threat to public health from the coronavirus pandemic is determined to be over.”

[Our COVID-19 tracker contains the most recent information on Maine cases by county]

State health officials said Tuesday that someone who later tested positive for the virus took a Concord Coach Lines bus between Concord and Boston on March 11 and 14; from Boston to Littleton on March 13 and from Boston to Concord on March 16. Those who rode the bus at the same time are being asked to stay home and monitor their health.

Concord Coach Lines operates Concord Express, Boston Express and Dartmouth Coach services that operate passenger service between communities in New Hampshire and Maine, as well as express service to Logan Airport and to New York City.

The company said all pre-purchased tickets will be honored on any trip before December 31, 2021