Sullivan Square Station and a chunk of I-93 North closed earlier today because MBTA police had to detonate something that was indeed "suspicious." This wasn't your ordinary stray item – this thing had wires and tubes around it.

The location was also a big factor according to the AP: "The package was found earlier this morning suspended above a busway that runs below an elevated section of Interstate 93 in the Charlestown section of Boston."

WBZ has other rattling details that suggest it was more than a package: "The device, a large circuit board with wires and batteries, was found attached to a beam with magnets about 15-to-20 feet above a busway that runs below an elevated section of the highway."

Luckily, this circuit board/package/thingy was harmless. After the MBTA blasted it, this circuit board won't hurt anyone.

Charlie on the MBTA also posted about the incident, and one of his commenters has a plausible theory: "I'll bet this turns out to be leftover construction or surveying equipment that had been sitting there unnoticed for months. Some contractor will be upset."

A much smaller circuit board from Flickr user Saaby.