Terrorism suspect Dzhokhar Tsaranaev apparently used his Twitter account  to discuss “fireworks” explosions that may have been tests for the deadly bombs that killed three people and injured 176 others at last week’s Boston Marathon.

In a March 20 conversation using his “@J-tsar” Twitter account, the 19-year-old Dzhokhar was asked by @TroyCrossley about reports that he and another person (@xXJungaXx) “were poppen fireworks” and replied, that “we can do some more damage I got some more left.”

That conversation was screen-capped by the Twitter user known as The Jester (@th3j35t3r), who connected it to reports of a police investigation of explosions in Hanover, Mass.:

Hanover fire and police departments seek the public’s help in identifying suspects or providing information in relation to two recent incidents where, over the past week, witnesses have reported explosions.
Officials are concerned the explosive devices could lead to injury or property damage. The recovered explosives appear to be homemade.
“We’re hoping neighbors may have seen something that may help us identify those responsible for detonating the devices,” said Hanover Fire Chief Jeff Blanchard.
The first incident was reported at 8:34 p.m. on March 12. Police and fire personnel responded to the area of Pine Street and Tower Hill Drive. Witnesses at the nearby Target store on Washington Street reported seeing a bright flash and hearing two explosions from that area.
Several unexploded devices were found at the scene and later detonated under secure conditions by the State Police Bomb Squad.
The second incident was a few days later at 7:49 p.m. on March 15.

Hanover is about 25 miles southeast of Boston, in what is known as the South Shore region of Massachusetts.

UPDATE: One of Dzhokhar’s Twitter friends, Junes Umarov, deleted his @xXjungaXx account today, but there is an archive of some of Umarov’s activity still online. Until two hours ago, @TroyCrossley — a 20-year-old would-be rap star — was vehemently proclaiming that the Tsarnaev brothers were framed, but Crossley’s account apparently fell silent about the time Umarov deleted his account.

Phone messages to a police official in Hanover, Mass., were not returned. It is not known whether the investigation into the explosions reported there last month is still continuing, or whether there is a connection between those reports and the Boston bombings.

UPDATE II: The conservative blog Weasel Zippers yesterday featured Dzhokhar’s “fireworks” Tweets with his friends Crossley and Umarov. Twitchy noted Crossley’s status as a “Dzhokhar Tsarnaev supporter.“ Meanwhile, The Jester’s Court blog outlines the potential connections and sarcastically concludes, “Obviously this is all just a series of unfortunate circumstantial coincidences.”