CONCORD, MASS. (WHDH) - Commuter Rail trains are running again on the Fitchburg Line Tuesday night after service was halted over explosive devices that were found on the tracks.

Police said the two small bottles were filled with chemicals, creating homemade explosive devices.

Officials said crews responded to the Concord MBTA station on Sudbury Road shortly before 6 p.m. and found the two bottles, one of which had ignited a brush in the area. A bomb squad was called to the scene, but no injuries were reported.

A hold was put on train traffic in and out of Concord. It has since been lifted.

Police ruled out the devices being connected to terrorism, saying they were possibly a juvenile prank.

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