Delays on the MBTA's Orange Line on Thursday morning ultimately stemmed from an incident involving Muslim prayer.
MBTA General Manager Frank DePaola said in a radio interview that riders called police saying a Middle Eastern couple was acting suspicious.
MBTA Transit Police responded and found the couple was praying for Ramadan.
The incident was resolved peacefully.
Police say people should be aware, but say people should also be sensitive.
The incident comes as MBTA officials are pulling officers from the money-counting room to patrol station following recent terror attacks in the nation, according to the Boston Herald.
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