Three, including a 25-year-old man, were accused of unlawful use of a weapon.
The teenager was charged with attempted murder and unlawful use of a weapon, police say.
(c) The use of a weapon, trap or net in a manner that endangers persons or property is prohibited.
Among them Trevion Hopson, 17, and Jeffrey Pruitt, 27, were charged with unlawful use of a weapon.
He was convicted in April on all 30 charges against him, including use of a weapon of mass destruction.
Mr. Reid has pleaded not guilty to attempted murder and attempted use of a weapon of mass destruction.
Mr. Reid was also charged with the attempted use of a weapon of mass destruction and attempted murder.
In April Tsarnaev was convicted on 30 counts related to the bombing, including use of a weapon of mass destruction.
He was charged with attempted use of a weapon of mass destruction among several terrorism and weapons counts.
The vast majority of those -- 342 -- were carried out without the use of a weapon, the police said.
The six charges against Umar Farouk Abdulmutallab include attempted use of a weapon of mass destruction and attempted murder.
